The length of the rope swing is approximately 98.9 feet (rounded to the nearest tenth of a foot).
Describe Algebraic Expression?Algebraic expressions are used to represent mathematical relationships and formulas, and can be used to solve equations and manipulate equations in order to isolate variables or solve for unknown quantities. They are used extensively in algebra, calculus, and other branches of mathematics.
We are given that the time for one swing is given by the formula:
t = 2√(L/32.2)
where L is the length of the rope swing in feet, and 32.2 is the acceleration due to gravity in feet per second squared.
We are also given that one swing takes 3.5 seconds, so we can write:
3.5 = 2√(L/32.2)
Squaring both sides, we get:
12.25 = 4(L/32.2)
Multiplying both sides by 32.2/4, we get:
L = 32.2 × 12.25/4
L ≈ 98.9 feet
Therefore, the length of the rope swing is approximately 98.9 feet (rounded to the nearest tenth of a foot).
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Alan and Ben had collected 360 game cards altogether. They played three games using these cards. In the first game, Alan lost 2 /5 of his cards to Ben. In the second game, Alan won 1 /4 of Ben cards. In the last game, Alan lost 1 /6 of his cards to Ben. In the end, both boys had the same number of cards. How many game cards did each boy have at first?
Answer:
Alan had 272 cards initially and Ben had 88 cards initially.
Step-by-step explanation:
Let's start by assuming that Alan had x cards and Ben had y cards initially. We know that the sum of their cards is 360, so:
x + y = 360
In the first game, Alan lost 2/5 of his cards to Ben, so he gave away (2/5)x cards to Ben. Therefore, he was left with:
(3/5)x cards
Ben received (2/5)x cards from Alan and had y cards initially, so he had:
y + (2/5)x
cards after the first game.
In the second game, Alan won 1/4 of Ben's cards, so he received (1/4)(y + (2/5)x) cards. Therefore, he had:
(3/5)x + (1/4)(y + (2/5)x)
cards after the second game.
In the third game, Alan lost 1/6 of his cards to Ben, so he gave away (1/6)(3/5)x cards to Ben. Therefore, he was left with:
(2/3)(3/5)x = (2/5)x
cards.
Ben received (1/6)(3/5)x cards from Alan in the third game, and he had y + (2/5)x cards after the first game. Therefore, he had:
y + (2/5)x + (1/6)(3/5)x = y + (9/25)x
cards after the third game.
Since both boys ended up with the same number of cards, we can set the expressions for their final card counts equal to each other:
(3/5)x + (1/4)(y + (2/5)x) = y + (9/25)x
Multiplying both sides by 100 to get rid of the fractions, we get:
60x + 25y + 50x = 100y + 36x
Simplifying, we get:
24x = 75y
Since x + y = 360, we can use this equation to solve for one of the variables in terms of the other:
x = 360 - y
Substituting into the equation we just obtained, we get:
24(360 - y) = 75y
Simplifying, we get:
8640 - 24y = 75y
99y = 8640
y = 87.27
Since y must be a whole number (since it represents the number of cards that Ben had initially), we can round it up to 88. Substituting into the equation x + y = 360, we get:
x + 88 = 360
x = 272
Therefore, Alan had 272 cards initially and Ben had 88 cards initially.
To find the initial number of game cards Alan and Ben had, we can set up an equation and solve for a variable. The equation involves using the information about the games played and the number of cards lost and gained by Alan. The solution will give us the initial numbers of cards for both boys.
Explanation:To solve this problem, let's assume that Alan had x cards and Ben had y cards at the beginning. We are given that Alan lost 2/5 of his cards to Ben in the first game, so he had (3/5)x cards left and Ben had y + (2/5)x cards. In the second game, Alan won 1/4 of Ben's cards, so he gained (1/4)(y + (2/5)x) cards, leaving him with (3/5)x + (1/4)(y + (2/5)x) cards. In the last game, Alan lost 1/6 of his cards to Ben, so he had (5/6)((3/5)x + (1/4)(y + (2/5)x)) cards left. Since both boys had the same number of cards in the end, we can set up the equation: (5/6)((3/5)x + (1/4)(y + (2/5)x)) = y + (2/5)x. After simplifying and solving for y in terms of x, we can substitute back into the equation to find the value of x.
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A farmer uses 162 pounds of fertilizer on 4 acres of crops. Each acre receives the same amount of fertilizer how much fertilizer does the farmer use on each acre of crops
Answer:
We can start by dividing the total amount of fertilizer by the number of acres:
162 pounds / 4 acres = 40.5 pounds per acre
Therefore, the farmer uses 40.5 pounds of fertilizer on each acre of crops.
Step-by-step explanation:
A school sells tickets to the school play through an online ticket company each ticket cost $8 and the company charges a $2.50 processing fee per order write an equation to represent the relationship between the number of tickets bought t and the total cost c with an equation
Answer:
c = 8t + 2.5
Step-by-step explanation:
The total cost c of buying t tickets is given by:
c = 8t + 2.5
Answer:
The total cost of buying t tickets can be represented by the equation:
c = 8t + 2.50
Where:
c is the total cost in dollars
t is the number of tickets bought
Five years ago, Castles in the Sand Inc. issued bonds at a face value of $1,000 at a yield to maturity of 4%. Now, with eight years left until the maturity of the bonds, the company has run into hard times, and the yield to maturity on the bonds has increased to 11%.
1). What is the price of the bond now? (Assume semiannual coupon payments.)
2). Suppose that investors believe that Castles can make good on the promised coupon payments but that the company will go bankrupt when the bond matures and the principal comes due. The expectation is that investors will receive only 50% of face value at maturity. If they buy the bond today, what yield to maturity do they expect to receive?
A. The price of the bond is $556.25.
B. The yield to maturity expected by investors is 20.36%.
What is YTM?Yield to maturity (YTM) is the total rate of return that will have been earned by a bond when it makes all interest payments and repays the original principal.
here, we have,
A. The price of the bond is calculated using the formula:
P = C × (1 − (1 + YTM/2)−2T ) ÷ (YTM/2) + (1 + YTM/2)−2T
Here, C is the coupon payment, YTM is the yield to maturity and T is the time to maturity in years.
Face value = $1,000
YTM = 8.2%
Time to maturity = 7 years
Coupon payment = 8.2% × $1,000 = $82
Substituting these values in the formula, we get:
P = $82 × (1 − (1 + 0.082/2)−14 ) ÷ (0.082/2) + (1 + 0.082/2)−14
P = $82 × (1 − 0.6774) ÷ 0.041 + 0.6774
P = $556.25
B. The yield to maturity expected by investors is calculated using the formula:
YTM = 2 × (C × (1 + YTM/2)−2T + (FV − P) × (1 + YTM/2)−2T ) ÷ P
Here, C is the coupon payment, YTM is the yield to maturity, FV is the face value of the bond and P is the price of the bond.
Expected face value at maturity = 85% × $1,000 = $850
Substituting these values in the formula, we get:
YTM = 2 × ($82 × (1 + YTM/2)−14 + ($850 − $556.25) × (1 + YTM/2)−14 ) ÷ $556.25
YTM = 2 × ($82 × (1 + YTM/2)−14 + ($293.75) × (1 + YTM/2)−14 ) ÷ $556.25
YTM = 2 × ($82 × 0.6774 + ($293.75) × 0.6774) ÷ $556.25
YTM = 2 × ($55.35 + ($198.57) ) ÷ $556.25
YTM = 2 × $253.92 ÷ $556.25
YTM = 0.2036 = 20.36%
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30 people gathered to watch a baseball game. While talking, they realized that 11 of them were Toronto Blue Jays fans. What is the probability that a randomly selected person from the group is a Toronto Blue Jays fan?
Type the answer in simple fraction form.
The probability that a randomly selected person from the group is a Toronto Blue Jays fan is 11/30.
What is the probability?Probability refers to the chance or likelihood that an expected outcome, event, or success occurs when there are many possible outcomes, events, or successes.
Probability is a fractional value that lies between one and zero depending on the degree of certainty.
Probabilities can be expressed as decimals, fractions, or percentages.
The total number of people who gathered to watch the baseball game = 30
The number of Toronto Blue Jays fans = 11
Thus, the probability of selecting a Toronto Blue Jay fan from the 30 spectators is 11/30.
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HI can someone please help me with these 2 questions!!
The statement that is not correct is FG/RS = EF/OS, the correct option is C.
What are similar triangles?A side of one triangle = k times corresponding side of its similar triangle
where k is the scale factor, constant for one pair of similar triangles. Now when we will take their ratio, the value of k cancels out, leaving no difference between first triangle or second triangle, but only caring if they are similar or not(which depends on angles).
Thus, the trigonometric functions depend only on angles.
We are given that;
Triangles EFG and QRS are similar
Now,
Option A states that EF/QR = CE/SQ, which is true by the definition of similarity of triangles.
Option B states that FG/RS = EG/QS, which is also true by the definition of similarity of triangles.
Option D states that 4GE/SQ = FE/RQ, which is also true as corresponding sides are proportional.
However, option C states that FG/RS = EF/OS, which is not necessarily true. There is no direct relationship between side OS and triangle EFG, so the ratio FG/RS cannot be equated to the ratio EF/OS.
Therefore, by the given similar triangles answer will be FG/RS = EF/OS.
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Are lines of latitude on a globe examples of lines in elliptic geometry? Explain why or why not.
Answer:
No, lines of latitude on a globe are not examples of lines in elliptic geometry. Elliptic geometry is a non-Euclidean geometry in which there are no parallel lines, and the sum of the angles in a triangle is greater than 180 degrees. However, lines of latitude on a globe are examples of lines in spherical geometry, which is a type of elliptic geometry. In spherical geometry, lines of latitude are great circles, which are the largest circles that can be drawn on a sphere and are analogous to the equator on Earth. Unlike lines in Euclidean geometry, great circles on a sphere do not maintain a constant distance from each other and intersect at two points on the sphere.
Step-by-step explanation:
PLEASE HELPPPPP ITS A HUGE GRADE!!!!! WILL MARK BRAINLIEST!!!
The missing angles inscribed in the circle are
∠ C = 26 degrees∠ B = 26 degrees∠ BSD = 97 degrees∠ CSE = 97 degrees∠ E = 57 degreesHow to find the anglesThe angles are calculated using the inscribed angle theorem
Inscribed Angle Theorem: The measure of an inscribed angle is half the measure of the intercepted arc.
This is used as follows
∠ C = 52/2 degrees
∠ C = 26 degrees
∠ C = ∠ B = 26 degrees inscribed angle subtended by same arc are equal
∠ BSD + ∠ D + B = 180 degrees sum of angles in a triangle
∠ BSD + 57 + 26 = 180
∠ BSD = 180 - 57 - 26
∠ BSD = 97 degrees
∠ CSE = ∠ BSD vertical angles
∠ CSE = 97 degrees
∠ E = ∠ B = 57 degrees inscribed angle subtended by same arc are equal
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Fill in the sentence below with the description that most specifically applies to the quadrilateral below.
The quadrilateral is most specifically a D. square, because C. all sides are congruent.
What is a square?
A quadrilateral with four equal edges is called a square. There are numerous items in our environment that have a square form. Equal sides and interior angles that are both 90 degrees distinguish each square form.
A square is a quadrilateral where all sides are congruent and all angles are right angles.
This matches the given description of the figure with 4 vertices, where the diagonal angles are same and all the sides are equal.
Therefore, the correct option for the first blank is D, and the correct options for the second blank is C.
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Answer:
The quadrilateral is most specifically a rhombus because all sides are congruent.
Step-by-step explanation:
From inspection of the given quadrilateral, we can see that:
All 4 sides are of equal length.Opposite angles are congruent, but adjacent angles are different.(This is denoted by the same number of tick marks on each congruent line segment and each congruent angle).
All sides of a square and a rectangle meet at right angles, i.e. their interior angles are congruent. Since the interior angles of the given quadrilateral are not all equal, the figure cannot be a square or a rectangle.
All sides of a rhombus are equal in length, and its opposite angles are congruent. This description matches the given shape. Therefore, the quadrilateral is a rhombus.
PRESENT AND FUTURE VALUES OF A CASH FLOW STREAMAn investment will pay $150 at the end of each of the next 3 years, $250 at the end of Year 4, $300 at the end of Year 5, and $500 at the end of Year 6. If other investments of equal risk earn 11% annually, what is its present value? Its future value?
Answer:
Step-by-step explanation:
To calculate the present value (PV) and future value (FV) of the cash flow stream, we can use the following steps:
Calculate the present value of each cash flow using the formula:
PV = CF / (1 + r)^n
where CF is the cash flow, r is the annual interest rate, and n is the number of years until the cash flow is received.
For the first three cash flows of $150 at the end of each of the next 3 years, assuming a starting point of Year 0, we have:
PV1 = $150 / (1 + 0.11)^1 = $134.59 (Year 1)
PV2 = $150 / (1 + 0.11)^2 = $120.75 (Year 2)
PV3 = $150 / (1 + 0.11)^3 = $107.99 (Year 3)
For the cash flow of $250 at the end of Year 4:
PV4 = $250 / (1 + 0.11)^4 = $165.14
For the cash flow of $300 at the end of Year 5:
PV5 = $300 / (1 + 0.11)^5 = $179.34
For the cash flow of $500 at the end of Year 6:
PV6 = $500 / (1 + 0.11)^6 = $277.12
Add up the present values of each cash flow to find the present value of the entire stream:
PV = PV1 + PV2 + PV3 + PV4 + PV5 + PV6
PV = $134.59 + $120.75 + $107.99 + $165.14 + $179.34 + $277.12
PV = $985.93
Therefore, the present value of the cash flow stream is $985.93.
To find the future value of the cash flow stream, we can simply add up the cash flows and then apply the future value formula:
FV = CF x [(1 + r)^n - 1] / r
where CF is the sum of the cash flows, r is the annual interest rate, and n is the number of years from the present until the future value is calculated.
CF = $150 x 3 + $250 + $300 + $500 = $1,100
n = 6 (assuming a starting point of Year 0)
FV = $1,100 x [(1 + 0.11)^6 - 1] / 0.11
FV = $2,525.72
Therefore, the future value of the cash flow stream is $2,525.72.
Xander has a checking account at Smart Money Bank. He chose an overdraft protection option that costs $20.00 every time
he writes a check for an insufficient amount. He is charged a monthly service fee of $15.00 if his account falls below $100.00.
Debt card transactions are free. An ATM fee of $1.00 is charged if he uses a non-Smart Money ATM. The online bank
statement shows all of the latest transactions.
What is Xander's ending balance?
O-$68.00
O $32.00
O $68.00
O-$32.00
Date
Transaction
Balance of $62.00
7/21
7/25 ATM withdrawal of $20 from Federal Credit Union
7/25 Online payment to Cell Phone Company of $42.00
7/28
Deposits his paycheck of $88.00
7/29 ATM withdrawal of $20 from Smart Money Bank
7/30
Check for $100 for rent
Xander's ending balance is -$68
What is Xander's ending balanceLet's start by calculating Xander's balance after each transaction:
7/21: Starting balance of $62.007/25: ATM withdrawal of $20.00 from Federal Credit Union, balance of $42.007/25: Online payment to Cell Phone Company of $42.00, balance of $0.007/28: Deposit of $88.00, balance of $88.007/29: ATM withdrawal of $20.00 from Smart Money Bank, balance of $68.007/30: Check for $100.00 for rent, balance of -$32.00Now let's consider the fees and charges:
Xander wrote a check for an insufficient amount, which triggered an overdraft protection fee of $20.00.His account fell below $100.00, which triggered a monthly service fee of $15.00.He used an ATM that is not a Smart Money ATM, which triggered an ATM fee of $1.00.So the total fees and charges are $20.00 + $15.00 + $1.00 = $36.00.
Therefore, Xander's ending balance is -$32.00 - $36.00 = -$68.00.
So the answer is -$68.00.
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44. A survey asked buyers whether color, size, or brand influenced their choice of cell phone. The results are below. How many people were influenced by brand?
5 only said color
8 only said size
16 only said brand
20 said only color and size
42 said only color and brand
53 said only size and brand
102 said all three
20 said none of these
222 people were influenced by brand.
What is Algebraic expression ?
Algebraic expression can be defined as combination of variables and constants.
To determine how many people were influenced by brand, we need to add up the number of people who said "brand" as one of their influencing factors. However, we need to be careful not to double-count those who selected multiple factors.
Let's start by creating a diagram of the data:
| Color | Size | Brand | Total
Only | 5 | 8 | 16 | 29
Color/Size| 20 | 0 | 42 | 62
Size/Brand| 0 | 53 | 42 | 95
All Three | 0 | 0 | 102 | 102
None | 20 | 20 | 20 | 60
Total | 45 | 81 | 222 | 348
From this table, we can see that 222 people said that brand influenced their choice of cell phone.
Therefore, 222 people were influenced by brand.
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Dan has 16 pencils. Quentin gives him
5 more pencils. Choose all the ways you
can use to find how many pencils Dan
has in all.
016 +5
o 16 + 4+
o 16-5
The way we can find the pencil Dan has in total is 16+5
What is word problem?A word problem is a math problem written out as a short story or scenario. Basically, it describes a realistic problem and asks you to imagine how you would solve it using math.
This word problem are interpreted to mathematical equations.
San has 16 pencils with him before,
Quentin gives him more 5 pencils
then the total pencil Dan will have is obtained by adding all the pencils together,
= 16+5
= 21 pencils
therefore the total number of pencil is found by 16+5 = 21
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Solve the given differential equation by variation of parameters. x2y'' − 3xy' + 3y = x^4'*e^x
Answer:
Step-by-step explanation:
To solve the differential equation x^2y'' − 3xy' + 3y = x^4e^x using variation of parameters, we can follow these steps:
Step 1: Find the complementary solution y_c by solving the homogeneous equation:
x^2y'' − 3xy' + 3y = 0
The characteristic equation is r(r-1) - 3r + 3 = 0, which simplifies to r^2 - 4r + 3 = 0. Factoring, we get (r-1)(r-3) = 0, so the roots are r=1 and r=3. Therefore, the complementary solution is:
y_c = c1x + c2x^3
where c1 and c2 are arbitrary constants.
Step 2: Find the particular solution y_p using variation of parameters. We assume that the particular solution has the form:
y_p = u1(x)*y1(x) + u2(x)*y2(x)
where y1 and y2 are solutions to the homogeneous equation (in this case, y1=x and y2=x^3) and u1 and u2 are functions to be determined.
We need to find the derivatives of y1 and y2:
y1' = 1, y1'' = 0
y2' = 3x^2, y2'' = 6x
Substituting into the differential equation and simplifying, we get:
x^2(u1''y1 + u2''y2) + x(u1'y1 + u2'y2) = x^4e^x
Plugging in y1 and y2 and simplifying, we get:
x^2(u1''*x + u2''*x^3) + x(u1'*1 + u2'*3x^2) = x^4e^x
We can write this equation in matrix form as:
[x^2x, x^2x^3] * [u1'', u2''] + [x1, x3x^2] * [u1', u2'] = [0, x^4e^x]
Taking the determinant of the coefficient matrix [x^2x, x^2x^3; x1, x3x^2], we get:
(x^2x)(x3x^2) - (x^2x^3)*x = 2x^4
Therefore, the inverse of the coefficient matrix is:
[3x, -x^3] / (2x^4)
Multiplying by the column vector [0, x^4e^x] gives:
[u1', u2'] = [3x, -x^3] * (1/(2x^4)) * [0, x^4e^x]
Simplifying, we get:
u1' = (3/2)*e^(-x), u2' = -(1/2)xe^(-x)
Integrating u1' and u2' with respect to x, we get:
u1 = -(3/2)*e^(-x), u2 = -(1/2)*xe^(-x) + C
where C is an arbitrary constant.
Therefore, the particular solution is:
y_p = -(3/2)xe^(-x) + Cx^3e^(-x)
where C is an arbitrary constant.
Step 3: The general solution of the differential equation is the sum of the complementary solution and the particular solution:
y = y_c + y_p
Kevin uses 48 ounces of dried apples and 22 ounces of dried
cranberries to make a fruit snack. He plans to sell the snacks
in pound containers. How many containers will he fill? Will
any fruit snack be left over?
Kevin will have 6 ounces of fruit snack left over after filling the 4 pound containers.
Describe Measurement units?There are several systems of measurement units, including the International System of Units (SI), the United States customary system, and the British imperial system. The SI is the most widely used system and is based on seven base units, including the meter (length), kilogram (mass), second (time), ampere (electric current), kelvin (temperature), mole (amount of substance), and candela (luminous intensity).
To determine how many containers Kevin can fill, we need to first calculate the total weight of the fruit snack.
Total weight of the fruit snack = Weight of dried apples + Weight of dried cranberries
= 48 ounces + 22 ounces
= 70 ounces
Since there are 16 ounces in 1 pound, we can convert the total weight to pounds as follows:
Total weight in pounds = 70 ounces ÷ 16 ounces/pound
= 4.375 pounds
Therefore, Kevin can fill 4 pound containers with fruit snack, with 0.375 pounds of fruit snack left over.
To determine if any fruit snack will be left over, we need to convert the remaining weight of 0.375 pounds back to ounces:
0.375 pounds × 16 ounces/pound = 6 ounces
Therefore, Kevin will have 6 ounces of fruit snack left over after filling the 4 pound containers.
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Please don't scam already got scammed 2 Times :(
The box plot represents the number of students who used a computer in the media center in 12 days.
A box plot uses a number line from 28 to 84 with tick marks every 1 unit. The box extends from 44 to 70 on the number line. A line in the box is at 60. The lines outside the box end at 30 and 82. The graph is titled Computer Use, and the line is labeled Number of Students.
Determine which of the following is the five-number summary of the data.
Min: 30, Q1: 48, Median: 62.5, Q3: 70, Max: 82
Min: 35, Q1: 48, Median: 61.5, Q3: 70, Max: 79
Min: 30, Q1: 44, Median: 60, Q3: 70, Max: 82
Min: 30, Q1: 48, Median: 61, Q3: 70, Max: 80
Answer: im sorry you got scamed :( but heres the answer the answer is C! Min: 30, Q1: 44, Median: 60, Q3: 70, Max: 82
Step-by-step explanation:
How do i know this? well if you look at the box plot it shows you that! it shows a tick on 30, 44, 60, 70 and 82 to its corresponding quartiles. and answer C is the only one that shows this. therefore the answer is C!
Mrs. Kim buys 2 x pounds of ham. Mrs. Lee buys 2.5 less pounds than Mrs. Kim. If the amount Mrs. Lee buys is y pounds of ham, express y in terms of x.
the amount Mrs. Lee buys in pounds of ham is given by y = 2x - 2.5.
Why it is and what is pound ?
If Mrs. Kim buys 2x pounds of ham, then Mrs. Lee buys 2.5 less pounds, or (2x - 2.5) pounds of ham.
We are asked to express the amount Mrs. Lee buys in terms of x, so we can write:
y = 2x - 2.5
Therefore, the amount Mrs. Lee buys in pounds of ham is given by y = 2x - 2.5.
Pound is a unit of measurement used to quantify weight or mass. It is abbreviated as "lb" or "lbs" and is commonly used in the United States and other countries. One pound is approximately 0.45 kilograms.
The pound is defined as exactly 0.45359237 kilograms, which is based on the international avoirdupois pound. In everyday use, the pound is often used to measure the weight of objects such as food, animals, and people.
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If each quadrilateral below is a rectangle, find the missing measures.
Please helpppp
The measures of the angles are JKN = 27 degrees and JNK = 126
How to determine the measures of the anglesThe complete question is added as an attachment
From the question, we have the following parameters that can be used in our computation:
The rectangle
On the rectangle, we have
JKN = NJK
Using the above as a guide, we have the following:
JKN = 27 degrees
Next, we use the sum of angles in a triangle theorem
The sum of angles in a triangle is 180
Mathematically, this is represented as
J + N + K = 180
So, we have the following representation
JNK = 180 - 27 * 2
Evaluate
JNK = 126
Hence, the measure of the angle JNK is 126 degrees
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find the vertex, y intercept, and x intercept to this quadratic function "y = x^2 + 2x - 3" pls show you work!
I need help fast, PLS HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:hunger
Step-by-step explanation:
i hungry
for problem 5 need p value
a) The correct null and alternative hypotheses are: given in option A:
H₀: Pkids = Padults
Ha: Pkids < Padults
b) the p-value is 0.004 (rounded to three significant figures).
a) The correct null and alternative hypotheses are:
H₀: Pkids = Padults (The proportion of kids who eat cereal for breakfast is equal to the proportion of adults who eat cereal for breakfast)
Ha: Pkids < Padults (The proportion of kids who eat cereal for breakfast is less than the proportion of adults who eat cereal for breakfast)
b) To test this claim, we can use a two-sample z-test for proportions. We calculate the test statistic as follows:
z = (phat1 - phat2) / √(p*(1-p)*(1/n1 + 1/n2))
where phat1 and phat2 are the sample proportions, n1 and n2 are the sample sizes, and p is the pooled proportion. The pooled proportion is calculated as:
p = (x1 + x2) / (n1 + n2)
where x1 and x2 are the number of successes in each sample.
Using the given data, we have:
phat1 = 70/95 = 0.737
phat2 = 35/58 = 0.603
n1 = 95
n2 = 58
x1 = 70
x2 = 35
p = (70 + 35) / (95 + 58)
= 0.680
Then, the test statistic is:
z = (0.737 - 0.603) / √(0.680*(1-0.680)*(1/95 + 1/58))
= 2.62
Using a standard normal distribution table or calculator, we find the p-value associated with a z-score of 2.62 is approximately 0.004.
Therefore, the p-value is 0.004 (rounded to three significant figures).
Since the p-value is less than the significance level of 0.05, we reject the null hypothesis and conclude that there is sufficient evidence to suggest that the proportion of kids who eat cereal for breakfast is less than the proportion of adults who eat cereal for breakfast.
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Full Question:
Cereal for Breakfast. A parent claims that kids eat cereal for breakfast more often than adults. A statistics-loving friend of the parent does some internet research and finds the following polling data. Of 95 kids polled, 70 of them say cereal is their most common breakfast. Of 58 adults polled, 35 of them say cereal is their most common breakfast. Test the parent's claim using these data.
a) Select the correct null and alternative hypotheses
H₀: Pkids = Padults
Ha: Pkids < Padults
H₀: Pkids = Padults
Hat Pkids ≠ Padults
H₀: Pkids = Padults
Ha: Pkids > Padults
b) Find the p-value (round to three significant figures).
Even though the triangles are all different sizes,the decimal for each ratio are
Even though the triangles are all different sizes,the decimal for each ratio are equal.
What is ratio ?
Ratios are commonly used in many different fields, including finance, engineering, and science. They are used to compare quantities or values that are not necessarily in the same units or are not directly comparable.
If the ratios of the corresponding sides of different triangles are equal, then the triangles are said to be similar. In this case, if the ratios of the sides of the different triangles are equal and result in the same decimal value, then it means that the triangles are similar to each other.
When two triangles are similar, it means that their corresponding angles are equal, and the ratios of their corresponding sides are also equal. This is known as the "angle-angle" or "AA" similarity criterion.
Therefore, if the ratios of the sides of different triangles are equal.
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What is |–6.5|?........................................................
Answer: 6.5
Step-by-step explanation:
[tex]|-6.5| = 6.5[/tex]
_________
guys pls give the correct answer quickly
The True statement is:
All the four function cut the y axis at (0, 3)
What is Intercept?The point at which the line or curve crosses the graph's axis is referred to as the intercept. When a point crosses the x-axis, it is referred to as the x-intercept. When a point crosses the y-axis, it is referred to as the y-intercept.
We have Four function
f(x) = 4[tex](2)^x[/tex] -1
g(x) = 3[tex](1/4)^x[/tex]
h(x) = [tex](1/2)^x[/tex] + 2
k(x) = -[tex]3^x[/tex] + 4
We have represented all the graph given below.
First, there is no function whose have negative y intercept.
Only f(x) have negative x intercept.
But all the four function cut the y axis at (0, 3)
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PLEASE HELP QUICK
Is X=[2 -1
6 -4] the inverse of A=[1/2 1/4
-2 -1/2]?
Select answers from the drop-down menus to correctly complete the statements.
The product of the matrices
(a - is b - is not)
the identity matrix. Therefore, X and A
(a - are b - are not)
inverses of each other.
Answer:
The product of the matrices A and X is the identity matrix. Therefore, X and A are inverses of each other.
Step-by-step explanation:
PLEASE ANSWER QUICK!!❌❌
Find the slope of a line perpendicular to the line whose equation is 9x - 3y = 81.
Fully simplify your answer.
Answer:
slope = 1/3
Step-by-step explanation:
9x-3y=81
-9x -9x
3y/3= -9x + 81/3
y = -3x +27
is perpendicular to...
y = 1/3x + 27
i need help sadly
what is 60% of 120?
Calculate the value of the expression 4+2(5+(-3))=
Answer:
8
Step-by-step explanation:
4 + 2 (5 - 3) = 8
hope this helps :))
Plot the point (−312, 434) on the coordinate plane.
The graph of the point is on the image at the end.
How to plot the point on a coordinate plane?A coordinate plane has two axes, one is horizontal and the other is vertical.
A general point (x, y) has the value "x" in the horizontal axis and "y" in the vertical one, then to graph (-312, 434 ) in a coordinate plane, you need to find -312 in the horizontal axis and 434 in the vertical one.
The graph of the point is on the image at the end.
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Shawn's coin collection contained 25 quarters, 20 dimes, 50 pennies, and 5 nickels. What was the
ratio of quarters to the total number of coins?
1. 04:1
2. 100 to 25
3. 1/4
4. 25: 1,000
The ratio of quarters to the total number of coins is 25:100, or simplified to 1:4.
What is the ratio and proportion ?
A ratio is an ordered pair of numbers a and b, written a / b where b does not equal 0. A proportion is an equation in which two ratios are set equal to each other. For example, if there is 1 boy and 3 girls you could write the ratio as 1 : 3 (for every one boy there are 3 girls).
To find the ratio of quarters to the total number of coins, we need to first calculate the total number of coins.
Total number of coins = number of quarters + number of dimes + number of pennies + number of nickels
Total number of coins = 25 + 20 + 50 + 5
Total number of coins = 100
Therefore, the total number of coins is 100.
The ratio of quarters to the total number of coins is:
Quarters : Total number of coins
= 25 : 100
= 1 : 4
Hence, the answer is option 3. 1/4.
Therefore, the ratio of quarters to the total number of coins is 25:100, or simplified to 1:4.
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HI can someone please help me with these 2 questions!!
Option A is the correct answer as EF/QR = CE/SQ is not correct, as the triangles contain no vertex C.
What is properties of similar triangles?Triangles with the same shape but different sizes are said to be similar triangles. Squares with any side length and all equilateral triangles are examples of related objects. In other words, if two triangles are similar, their corresponding sides are proportionately equal and their corresponding angles are congruent.
Although having the same form, each might have different sizes.
There are no matching angles that are not equal.
Similar equivalent side ratios exist.
Given that, EFG and QRS are similar.
We know that for similar triangles the ratio of length of the segments of the corresponding triangle are equal.
Thus, EF/QR = CE/SQ is not correct, as the triangles contain no vertex C.
Hence, option A is the correct answer.
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