Answers
Answer:21
Step-by-step explanation:
Answer:
y = 3
Step-by-step explanation:
9 - y = 2y
Step 1: Add y to both sides
9 - y + y = 2y + y
9 = 3y
Step 2: Divide both sides by 3
9 / 3 = 3y / 3
3 = y
Answer: y = 3
Related Questions
Which of the following are solutions to the equation below?
Check all that apply.
x2 + 10x + 25 = 8
Answers
Answer:
The correct options for the solution values are:
[tex]x=2\sqrt{2}-5[/tex][tex]x=-2\sqrt{2}-5[/tex]Step-by-step explanation:
Given the expression
[tex]x^2+10x+25=8[/tex]
Subtract 25 from both sides
[tex]x^2+10x+25-25=8-25[/tex]
Simplify
[tex]x^2+10x=-17[/tex]
Add 25 or 5² to both sides
[tex]x^2+10x+5^2=8[/tex]
as
[tex]x^2+10x+5^2=\left(x+5\right)^2[/tex]
so the expression becomes
[tex]\left(x+5\right)^2=8[/tex]
[tex]\mathrm{For\:}f^2\left(x\right)=a\mathrm{\:the\:solutions\:are\:}f\left(x\right)=\sqrt{a},\:-\sqrt{a}[/tex]
solve
[tex]x+5=\sqrt{8}[/tex]
Subtract 5 from both sides
[tex]x+5-5=2\sqrt{2}-5[/tex]
[tex]x=2\sqrt{2}-5[/tex]
solve
[tex]x+5=-\sqrt{8}[/tex]
Subtract 5 from both sides
[tex]x+5-5=-2\sqrt{2}-5[/tex]
[tex]x=-2\sqrt{2}-5[/tex]
Therefore, the solution to the equation
[tex]x=2\sqrt{2}-5,\:x=-2\sqrt{2}-5[/tex]
Hence, the correct options for the solution values are:
[tex]x=2\sqrt{2}-5[/tex][tex]x=-2\sqrt{2}-5[/tex]69 cents each. She used partial products to find the total cost in cents. Which are NOT possible partial products for 24 × 69? Choose all that apply. A. 24 B. 36 C. 180 D. 240
Answers
Answer:
A. 24
Step-by-step explanation:
If we have two digits to multiply together, the multiplication of the individual digit of those number with each other whereby each digit retain its place is known as partial product.
From the given question, by applying the distributive property method, the partial products are:
24 × 69 = 24 × (60 + 9)
open brackets
= (24 × 60) + (24 × 9)
By factorization
= 60 (20 + 4) + 9(20 + 4)
expanding the brackets, we get:
= (60 × 20) + (60 × 4) + (9 × 20) + (9 × 4)
= 1200 + 240 + 180 + 36 (These are the partial products)
= 1656
Which expression has a value of — 7?
0.(-3) +4
O (-10) + 3
0 (-3) +10 fing
O (-4) +3
Answers
Answer:
(-10) + 3
Step-by-step explanation:
hopefully it helped
HELP!! WHAT ARE THE ANSWERS??!!!
Answers
=================================
Explanation:
The result of problem 7 is undefined because the matrices are not the same size. Both matrices must have the same number of rows, and they must have the same number of columns. This is so the terms match up when we add them. This applies to question 9 as well because subtraction is a form of addition.
For problem 8, we add the corresponding terms. So for instance, along the top we have -2+(-3) = -5 as the first entry in the top row. So that's why the answer is C for problem 8. Problem 10 and 11 are similar to this. Be careful to distribute the negative through to each term in the second matrix when subtracting matrices.
For problem 12, we multiply the outer 3 by each term inside the matrix. We end up with choice B.
The cost of a ticket to an amusement park is $42 per person. For groups of up to 8 people, the cost per ticket decreases by $3 for each person in the group. Marcos's ticket cost $30. Write and solve an equation to find the number of people in Marcos's group.
Answers
Answer:
Cost of each ticket per person = $42
For groups of up to 8 people, the cost per ticket decreases by $3 for each person in the group.
Marco's ticket cost $30.
This means he paid 42-30=12 dollars less.
Now when there are 8 members, the cost decreases by $3.
So, $12 will decrease, when there will be members
I hope this helps! Have an awesome day!
Answer:
The answer is there are 32 people in this group
Step-by-step explanation:
here is proof work if you need it:
A political poll showed that 80 percent of those polled said they would vote for proposition P. Of those who said they would vote for proposition P,70 percent actually voted for P,and of those who did not say they would vote for P,20 percent actual voted for P.What percent of those polled voted for P
Answers
Answer:
60%
Step-by-step explanation:
Let the total number of people polled to vote be 1000
80% said they would vote for him
That is 800
20% said they would not vote for him
That is 200
Out of the 800, 70% actually voted
That will be ;
70/100 * 80 = 560
Also, 20% of the 200 that said they would not vote actually voted
That will be ;
20/100 * 200 = 40
Total is thus;
569 + 40 = 600
% is 600/1000 = 60%
determine the force of gravitational attractions between the Earth 5.98 x 10^24 kg and a 70kg boy is standing at sea level, a distance og 6.38 x 10^6m Earth's center ( the universal gravitational constant (G) = 6.6726 x 10 ( raise to power) 11 N/m/kg^ 2)
Answers
Answer:
6.862035456*10^26 m/s^2
Step-by-step explanation:
We know that:
m=70kg
M=Mass of earth=5.98*10^24kg
R=Distance between object's and earth's center=6.38*10^6m
G=6.6726*10^-11 N/m/kg^2
Thus, we can use the equation [tex]F_g=\frac{GmM}{R^2}\\[/tex]:
[tex]F_g=\frac{(6.6726*10^-11)(70)(5.98*10^{24})}{(6.38*10^{-6})^2}\\\\F_g=6.862035456*10^{26}[/tex]
This means the force of gravitational attractions is 6.862035456*10^26 m/s^2
Ill mark brainless to who answers first and correct :)
Answers
Answer:
$4.69
Step-by-step explanation:
$11.96/4 (because he bought 4 candles)
$2.99
each candle was $2.99 at the sale price
Now because the question is only asking for the amount of 1 candle before the sell price all you have to do is add $1.70 to $2.99 and you have your answer. Hope this helps!
Which polynomial represents the area of the rectangle?
a. 3x2+2x−5
b. 3x2−5
c. 3x2−2x−5
d. 3x2−8x−5
Answers
Answer:
Step-by-step explanation:
The correct option is C.
Step-by-step explanation:
The width of the rectangular pen is
The length of the rectangular pen is
The perimeter of a rectangle is
Therefore the correct option is C.
A total of 250 people were surveyed about whether or not each person carries a cell phone. The results are shown below in the relative frequency table.
Answers
180 people
Step-by-step explanation:
None of them logically make sense. A is wrong because it is a higher amount of people who carry a cell phone than not. B and C is wrong because not 100% of people they interviewed carry a cell phone so D is the correct answer
Answer:it is 180
Step-by-step explanation:
if sinA+cosecA=3 find the value of sin2A+cosec2A
Answers
Answer:
[tex]\sin 2A + \csc 2A = 2.122[/tex]
Step-by-step explanation:
Let [tex]f(A) = \sin A + \csc A[/tex], we proceed to transform the expression into an equivalent form of sines and cosines by means of the following trigonometrical identity:
[tex]\csc A = \frac{1}{\sin A}[/tex] (1)
[tex]\sin^{2}A +\cos^{2}A = 1[/tex] (2)
Now we perform the operations: [tex]f(A) = 3[/tex]
[tex]\sin A + \csc A = 3[/tex]
[tex]\sin A + \frac{1}{\sin A} = 3[/tex]
[tex]\sin ^{2}A + 1 = 3\cdot \sin A[/tex]
[tex]\sin^{2}A -3\cdot \sin A +1 = 0[/tex] (3)
By the quadratic formula, we find the following solutions:
[tex]\sin A_{1} \approx 2.618[/tex] and [tex]\sin A_{2} \approx 0.382[/tex]
Since sine is a bounded function between -1 and 1, the only solution that is mathematically reasonable is:
[tex]\sin A \approx 0.382[/tex]
By means of inverse trigonometrical function, we get the value associate of the function in sexagesimal degrees:
[tex]A \approx 22.457^{\circ}[/tex]
Then, the values of the cosine associated with that angle is:
[tex]\cos A \approx 0.924[/tex]
Now, we have that [tex]f(A) = \sin 2A +\csc2A[/tex], we proceed to transform the expression into an equivalent form with sines and cosines. The following trignometrical identities are used:
[tex]\sin 2A = 2\cdot \sin A\cdot \cos A[/tex] (4)
[tex]\csc 2A = \frac{1}{\sin 2A}[/tex] (5)
[tex]f(A) = \sin 2A + \csc 2A[/tex]
[tex]f(A) = \sin 2A + \frac{1}{\sin 2A}[/tex]
[tex]f(A) = \frac{\sin^{2} 2A+1}{\sin 2A}[/tex]
[tex]f(A) = \frac{4\cdot \sin^{2}A\cdot \cos^{2}A+1}{2\cdot \sin A \cdot \cos A}[/tex]
If we know that [tex]\sin A \approx 0.382[/tex] and [tex]\cos A \approx 0.924[/tex], then the value of the function is:
[tex]f(A) = \frac{4\cdot (0.382)^{2}\cdot (0.924)^{2}+1}{2\cdot (0.382)\cdot (0.924)}[/tex]
[tex]f(A) = 2.122[/tex]
Find the height of the following triangles:
Ab =?
Cb=6m
Angle acb = 45 degree
Answers
Answer:
AB=6Step-by-step explanation:
according to the question
the equation is
[tex] \tan(45 {}^{o} ) = \frac{x}{6} [/tex]
[tex]1 = \frac{x}{6} [/tex]
[tex]x = 6[/tex]
Alexandra purchases two donuts and three cookies at the donut shop and it's charged $3.30. Brianna purchases five donuts and two cookies at the same shop for $4.95. All the donuts have the same price and all the cookies have the same price. What is the cost in dollars of each donut?
Answers
Given:
Cost of two donuts and three cookies = $3.30
Cost of five donuts and two cookies = $4.95
To find:
The cost of each donut.
Solution:
Let x be the cost of each donut and y be the cost of each cookie.
Cost of two donuts and three cookies = $3.30
[tex]2x+3y=3.30[/tex] ...(i)
Cost of five donuts and two cookies = $4.95
[tex]5x+2y=4.95[/tex] ...(ii)
Multiply equation (i) by 2.
[tex]4x+6y=6.60[/tex] ...(iii)
Multiply equation (ii) by 3.
[tex]15x+6y=14.85[/tex] ...(iv)
Subtracting (iii) from (iv), we get
[tex]15x+6y-4x-6y=14.85-6.60[/tex]
[tex]11x=8.25[/tex]
Divide both sides by 11.
[tex]x=\dfrac{8.25}{11}[/tex]
[tex]x=0.75[/tex]
Therefore, the cost of each donut is $0.75.
If g(x) = 4x + 1 and g(x) = -11, find x.
Answers
Answer:
x = - 3
Step-by-step explanation:
g(x) = 4x + 1...... (1)
g(x) = -11.... (2)
From equations (1) & (2)
-11 = 4x + 1
-11 - 1 = 4x
-12 = 4x
-12/4 = x
-3 = x
x = - 3
Point M is on line segment overline LN . Given LN = 11 and LM = 4 , determine the length MN.
Answers
Answer:
7
Step-by-step explanation:
whats is this bruh
Answers
Answer:
A. (f - g)(x) = -7x - 3
General Formulas and Concepts:
Algebra I
Composite FunctionsCombining Like TermsStep-by-step explanation:
Step 1: Define
f(x) = -3x - 5
g(x) = 4x - 2
(f - g)(x) is f(x) - g(x)
Step 2: Find (f - g)(x)
Substitute: (f - g)(x) = -3x - 5 - (4x - 2)Distribute -1: (f - g)(x) = -3x - 5 - 4x + 2Combine like terms: (f - g)(x) = -7x - 3Answer:
A. (f - g)(x) = -7x - 3
General Formulas and Concepts:
Algebra I
Composite Functions
Combining Like Terms
Step-by-step explanation:
Step 1: Define
f(x) = -3x - 5
g(x) = 4x - 2
(f - g)(x) is f(x) - g(x)
Step 2: Find (f - g)(x)
Substitute: (f - g)(x) = -3x - 5 - (4x - 2)
Distribute -1: (f - g)(x) = -3x - 5 - 4x + 2
Combine like terms: (f - g)(x) = -7x - 3
will give brainly
show work
23-5•4-2(6-1)
Answers
Answer:-7
Step-by-step explanation:
Answer:
-7
Step-by-step explanation:
so you have to do PEMDAS
first parenthesis 6-1 is 5
then multiplication 5x4 is 20
the subtraction 23-20-2(5)
2x5=10
23-20=3
3-10=-7
What does y equal? A. 51 B. 39 C. 37
Answers
Answer:
B. 39°
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
BracketsParenthesisExponentsMultiplicationDivisionAdditionSubtractionLeft to RightAlgebra I
Equality PropertiesGeometry
[Right Triangles Only] SOHCAHTOA[Right Triangles Only] tanθ = opposite over adjacentStep-by-step explanation:
Step 1: Identify
Angle θ = y
Opposite Leg = 8
Adjacent Leg = 10
Step 2: Solve for y
Substitute [Tangent]: tan(y) = 8/10Simplify: tan(y) = 4/5Inverse Trig: y = tan⁻¹(4/5)Evaluate: y = 38.6598Round: y ≈ 39°If a car decreases its speed from 80 km/h to 45 km/h in 14 seconds, what is its rate of acceleration?
Answers
Answer:
-2.5 km
Step-by-step explanation:
80 - 45= 35
35 / 14 sec. = 2.5
So if your decreasing it would turn that 2.5 into a negative.
Write a linear equation that is parallel to the equation below and passes through the point (7, 4). y = 2x − 7
Answers
Answer:
y=2x-10
Step-by-step explanation:
Original Equation: y=2x-7
Plug in (7,4) and keep the same slope bec line has to be parallel
b=-10
plug in b
y=2x-10
The value of a collectible coin can be represented by the equation y = 2 x + 9.74, where x represents the number of years that Consuello has owned the coin and y represents the total value, in dollars, of the coin. What was the value of the coin when Consuello originally purchased it? $4.87 $7.74 $9.74 $19.48
Answers
Answer:
you would multiply 2 * 4.87 and then add that to 9.74 and then you do that to everyone and then one of them will get you your answer and I am not sure about the answer but I think its b
Step-by-step explanation:
Answer:
The value of the coin when Consuelo originally purchased it is $9.74 ⇒ C
Step-by-step explanation:
The form of the linear equation is;
y = m x + b, where
m is the slope of the line (The rate)
b is the y-intercept (initial amount, value y at x = 0)
∵ The value of a collectible coin can be represented by the equation
y = 2 x + 9.74
→ Compare it with the form of the linear equation above
∴ m = 2
∴ b = 9.74
∵ x represents the number of years that Consuelo has owned the coin
∵ y represents the total value, in dollars, of the coin
→ That means the value of y at x = 0 is the value of the coin when
Consuelo originally purchased it
∵ b represents the value of y at x = 0
∵ b = 9.74
∴ The value of the coin when Consuelo originally purchased it is $9.74
Calculate The Constant of Proportionality (k) and Write an Equation for the line in the Graph Below:
Answers
Answer:
K = ½
Equation: y = ½x
Step-by-step explanation:
✔️Constant of proportionality (k) = y/x
Using a point on the line, (2, 1),
k = ½
✔️Equation of a proportional relationship would be in the form of y = kx
To write an equation, substitute k = ½, into y = kx
Thus:
y = ½x
what is the line that passes through (2,4) and (3,8)
Answers
Answer:
2, 4
Step-by-step explanation:
i just look at a graph
Answer:
the axis of symmetry
Step-by-step explanation:
I need help ASAPPPPPO
Answers
Answer:
3x²y==
Step-by-step explanation:
Multiple the number
Please help. 100 points + brainliest
IMPORTANT NOTE: the "*" sign in the equations means it is the end point of the square root sign.
Solve the following equations:
1) Solve for x: √12* (√3* - x) = 15
2) Solve for x: √3x - 1* = 7 What is the root? If there is no root, choose none.
3) Solve for x: √3x* + 1 = 7 What is the root? If there is no root, choose none.
4) Solve for x: 3√x* + 1 = 7 What is the root? If there is no root, choose none.
5) Solve for x: √2y - 5* + 4 = 8 What is the root? If there is no root, choose none.
6) Solve for z: √z^2 + 5* - 2 = z What is the root? If there is no root, choose none.
Answers
Answer:
1) x = -2.5
2) x = 21 1/3
3) x = 12
4) x = 4
5) y = 40.5
Step-by-step explanation:
Answer:
1) x = -2.5
2) x = 21 1/3
3) x = 12
4) x = 4
5) y = 40.5
Give the person above a brainliest
❓❗❓❗PLEASE HELP ASAP❓❗❓❗
(3z^3 – 4z + 7z^2) + (8z^2 - 6z - 5)
Simplify (8x^3 - 5x+1)-(x^2+4). Show your work
Simplify the product 4x(5x^2+ 3x +7).
Simplify and write in standard form
Answers
which statement describes the relationship between -2 and -4?
Answers
plzzzz help!!! quick one
Answers
Because straight line adds up to 180
So 180-115= 65
Write a unit rate for the situation. Round to the nearest hundredth if necessary. 210 heartbeats in 3 minutes
Answers
Answer:
70 heartbeats per second
Step-by-step explanation:
Samuel and Joyce both bought CDs. Samuel bought 3x CDs and Joyce bought 2x-1 CDs. If each CD had a Regular price of $18 and a discount of $2. What is the expression for the COST of their CDs, combined?
Answers
Answer:
2(5x – 1)
Step-by-step explanation: