Answer:
12.2
Step-by-step explanation:
First add all numbers.
Then divide it by the amount of numbers you added.
Then you have the average.
Hope this helped.
Eli wants to purchase some new school supplies. He wants to buy a calculator that costs $24 and some notebooks for school. Each notebook costs $2. Eli only has $37 to spend.
Let n represent the number of notebooks that Eli buys.
Which inequality describes this scenario?
37 Greater than or equal to 2n+24
37 < 2n+24
37 > 2n+24
37 Less than or equal to 2n+24
The inequality that models the scenario is the first one:
$24 + $2*n ≤ $37
Solving that we conclude that Eli can buy at most 6 notebooks.
Which inequality describes this scenario?
We know that Eli wants to buy a calculator that costs $24 and some notebooks, such that each notebook costs $2.
Then If Eli buys the calculator and n notebooks the total cost will be:
$24 + $2*n
We know that Eli has a total of $37 to spend, so that is the maximum amount he can spend. Thus, we can write the inequality:
$24 + $2*n ≤ $37
So the correct option is the first one.
Now also let's solve the inequality for n.
$24 + $2*n ≤ $37
$2*n ≤ $37 - $24
$2*n ≤ $13.
n ≤ $13/$2
n ≤ 6.5
So Eli can buy at most 6 notebooks.
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Solve for X. 20 points !!!!
Answer:
4) x = - 12
5) x = 4
Step-by-step explanation:
4)
Since points T and S are mid points of sides ML and MN of triangle MLN.
Therefore, by mid point theorem,
TS is half of LN
so,
[tex]x + 26 = \frac{1}{2} (x + 40) \\ \\ 2(x + 26) =x + 40 \\ \\ 2x + 52 = x + 40 \\ \\ 2x - x = 40 - 52 \\ \\ x = - 12[/tex]
5) In the same way x = 4 will be the correct answer in question number 5.
in an effort to improve a statistics course, we want to interview randomly chosen students about their attitudes toward the class. there are 800 students currently enrolled, and six instructors who teach sections of the course.
Stratified random sample would be the sampling design for the best information.
• In statistics, stratified sampling is an method of sampling from a population which can be divided into subpopulations. In surveys based on statistics, when subpopulation within an overall population var, it could be advantageous to sample each population separately.
• For example one may divide a sample of children into subgroups by age like 1-5,6-10,11-15 and above.
• The benefits of stratified sampling is that you can obtain reasonably precise estimate for subgroups related to the research.
• One disadvantage of stratified sampling is that the selection of appropriate strata for a sample of your research may be difficult.
• The effective use of stratified sampling can be Analysing 30% of the items under $30,000.
In this question we use stratified sampling.
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PLEASE HELP
Are the triangles shown at the right congruent? Explain. (picture of triangle below)
A. Yes, by SSA.
B. Yes, by the HL Theorem.
C. No; SSA cannot be used because there is only one pair of congruent corresponding sides.
D. No; the HL Theorem cannot be used because there is only one pair of congruent legs.
Answer:
A
Step-by-step explanation:
they look the same to me :D
Which equation represents a line which is parallel to the line 7y - 4x = -49
a) y= 7/4x+3
b) y= -7/4x+1
c) y=4/7x+7
d) y= -4/7x+4
From the option given, we can see that the equation that represents a line that is parallel to the line 7y - 4x = -49 is y=4/7x+7. Option D
The standard equation of a line is expressed as y = mx + b where
m is the slopeGiven the equation of a line expressed as 7y - 4x = -49
Make y the subject of the formula:
[tex]7y - 4x = -49\\7y=4x-49\\y=\frac{4}{7}x-\frac{49}{7}\\y= \frac{4}{7}x-7[/tex]
Hence the slope of the given line is 4/7
The equation parallel to this line will also have a slope of 4/6. Hence the correct option will be the equation with a slope of 4/7
From the option given, we can see that the equation that represents a line that is parallel to the line 7y - 4x = -49 is y=4/7x+7
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multiply (5x+2)(x-5)
need help please
Answer:
5x^2-25x+2x-10
5x^2-23x-10
Step-by-step explanation:
need thanks and make me brainiest if it helps you
Answer:
5x2 -35 +2x
Step-by-step explanation:
(5x+2)(x-5)
5x(x-5) +2(x-5)
5x2- 25 +2x -10
5x2 - 25 -10 +2x
5x2 -35 +2x
Please help!
How do you find the slope of this equation
y = 7x-3
Answer:
Step-by-step explanation:
H
Answer:
The slope is 7
Step-by-step explanation:
y = mx + b
m is the slope and as we can see in the equation, 7 is there instead of m, therefore 7 is the slope
10000000000 in standard form
Answer: 10^10
Step-by-step explanation:
Nick climbed a hill with an elevation of feet. Later that day, he returned home descending 700 feet. Jacob deposited his paycheck of $ . Later that week, he withdrew the same amount of $225 to buy a new TV. Janine was scuba diving and dove 25 feet to look at the fish on the coral reef. She then swam feet to the surface. The temperature started at -25 degrees. During the day, the temperature rose 5 degrees and then dropped 5 degrees. At the end of the day, the temperature was degrees.
Answer:
700, 225, 25, -25
Step-by-step explanation:
In the question given, we have to fill the blanks in the situations to describe an opposite quantities which combines to make zero.
1. Nick returned home descending 700 feet later at the day because he climbed a hill that was 700 feet high.
2. Jack deposited an amount of $225 in his account but later that week, he bought a new TV by withdrawing the amount of $225 from his account.
3. Janine dove into the sea to look at the coral reefs to a depth of 25 feet, and then she swam back to the sea surface by swimming 25 feet upwards.
4. The final temperature at the end of the day was -25 degrees, as the morning temperature was -25 degrees and then at daytime, it rose for 5 degrees and then again dropped by 5 degrees.
Solve using substitution and show your work:
-3x-3y=3
y=-5x-17
Answer:
Step-by-step explanation:
Isolate any variable, x or y, but since y has already been isolated, use y to solve for x.
Substitute y into the first equation -3x-3y=3
This equals -3x - 3 (-5x - 17) = 3
Distribute to get -3x + 15x + 51 = 3
Then bring like terms together. -3x + 15x = 3 - 51
12x = -48
Solve for x
x = -4
Substitute -4 for x in the equation: y = -5x - 17
y = − 5x − 17
y = (−5) (−4) − 17
y = 20 - 17
y = 3 ( Simplify both sides of the equation)
Answer:
x = − 4 and y = 3
what is the multiplicative inverse of 10 raise to the power 10
Answer:
10*10*10*10*10*10*10*10*10*10
HELPPPPPPPP PLEASEEEEEEEE
pls pls plssss helppOOOOoo
Which graph represents the function f(x) = |x|?
Answer:
Graph 1
Step-by-step explanation:
If m< EBC = 3y+10 and m< ABE = 2y-20, find m< EBF.
If m< EBC = 3y+10 and m< ABE = 2y-20, the value of m< EBF is 56 degrees
How to solve for the angleThe questions says that If m< EBC = 3y+10 and m< ABE = 2y-20, find m< EBF.
We have to solve this using the rule of supplementary angles that says that
m<EBC + m<ABE = 180 degrees
This would be written as
3y+10 + 2y-20 = 180
collect like terms
3y + 2y + 10 - 20 = 180
5y - 10 = 180
5y = 180 + 10
5y = 190
then y = 190/5
y = 38 degrees
We have to put the value of y in 2y-20
= 2 * 38 - 20
= 76 - 20
= 56
Given that
m< ABE = m< EBF
Then the value of m< EBF = 56
12. we have < EBF = < ABE - < ABF
then 2b - (7b - 24)
when we open the bracket
< EBF = -5b + 24
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Does the table below represent a proportional relationship?
x 1 2 3 4
y -4 -8 -12 -16
A.
Yes, because all the ratios of y to x are equal to -2.
B.
No, because the table has negative numbers.
C.
Yes, because all the ratios of y to x are equal to -4.
D.
No, because the ratios of y to x are not equal.
Answer:
C
Step-by-step explanation:
Here, we want to know if the table represents a proportional relationship
Looking at the table, if we multiply the x-terms by -4, we get the y-terms
So the answer here is that Yes, because all the ratios of y to x are equal to -4
Brandon and his children went into a bakery and where they sell donuts for $1.25 each and cookies for $0.25 each. Brandon has $5.50 to spend and must buy a minimum of 10 donuts and cookies altogether. If Brandon decided to buy 2 cookies, determine the maximum number of donuts that he could buy. If there are no possible solutions, submit an empty answer.
Answer:he can buy four donuts
Step-by-step explanation:
He bought two cookies which is .50 cents
Subtract .50 cent from the total amount which is $5
Divide that by 1.25
I got 4
8 1/4 divided by 3/8
Answer:
11over32
Step-by-step explanation:
In their last game of the basketball season, Jessica has made 7 out of 10 shots so far, and Linda has made 12 out of 15 shots. As the coach, you must decide which player will shoot the final deciding shot for the game. (You want to choose the girl with the higher percent of shots made so far). What is the percent for each girl and which girl would you choose? * Your answer
Answer:
Linda
Step-by-step explanation:
is 3x+4y=1 written in slope intercept form?
Answer:
no
Step-by-step explanation:
if you want it in slope intercept form it would be :
y= -3/4 + 1/4
One number is 4 times as large as another. The sum of their reciprocals is ½. What is the sum of the numbers? i need asap answer plssss
Answer:
The sum of the two numbers is 12.5
Step-by-step explanation:
First we write a system of equations.
One number is 4 times larger than the other.
y = 4x
The sum of their reciprocals is 1/2
1/x + 1/y = 1/2
Substitute
1/x + 1/4x = 1/2
1 + 1/4 = 1/2x
x = 2.5
Solve for other number
y = 4(2.5)
y = 10
The inverse of x is 2/5 or 4/10, and the inverse of y is 1/10. When added the sum is 5/10 or 1/2.
Find the equation of the line.
Use exact numbers.
y = __x + __
Answer: y= x-5
Step-by-step explanation:
It already gave you the y-intercept, which is on the y-axis. It is: (0,-5)
So your equation is: y = mx-5
Now you find your slope by using the two points it gives us: (0,-5) and (5,0)
-5 - 0= -5(from the two y- coordinates) and 0 - 5 = -5(from the two x-coordinates)
That is -5 divided by -5 so the answer would be 1
Your equation is: y = 1x-5
But you don't have to put the 1 because the x itself counts as 1
Find the inverse of the following function: f(x)=√(2x +3) - 4
Determine the domain for which this inverse function will be defined. Write your answer as an inequality.
I have this question for GMM and I got the inverse right, but I don't know how to get the domain. I thought it was x<(or equal to) 3/2 but it says it's wrong
The domain of the inverse function in inequality is written as x ≥ √3 -4.
What is domain and range ?
The is the set of possible input values, and the range is the set of all possible output values of the graph.
Here, the given function is :
f(x) = √(2x +3) - 4
and it is already found that its inverse is :
f⁻¹(x) = {(x+4)² - 3}/ -2
Therefore, to find the domain of this inverse function we equate the numerator to greater then equals to zero that is :
(x+4)² - 3 ≥ 0
(x+4)² ≥ 3
(x+4) ≥ √3
x ≥ √3 -4
Therefore, the domain of the inverse function in inequality is written as x ≥ √3 -4.
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what is x in 4x²-12x+ 9 = 0
Answer: x = √9/8
answer is x = square root of 9/8
Step-by-step explanation:
The burning time of a very large candle is normally distributed with mean of 2500 hours and standard deviation of 20 hours. Find the z-score thay correspondes to a lifespan of 2470 hours. A. 2.5 B.1.5 C.-1.5 D-2.4
Answer: C.-1.5
Step-by-step explanation:
Given: The burning time of a very large candle is normally distributed with mean[tex](\mu)[/tex] of 2500 hours and standard deviation[tex](\sigma)[/tex] of 20 hours.
Let X be a random variable that represent the burning time of a very large candle.
Formula: [tex]Z=\dfrac{X-\mu}{\sigma}[/tex]
For X = 2470
[tex]Z=\dfrac{2470-2500}{20}\\\\\Rightarrow\ Z=\dfrac{-30}{20}\\\\\Rightarrow\ Z=\dfrac{-3}{2}\\\\\Rightarrow\ Z=-1.5[/tex]
So, the z-score they corresponds to a lifespan of 2470 hours. =-1.5
Hence, the correct option is C.-1.5.
what is seven not an example of
The correct option is (C) variable.
Seven is not an example of variable.
What is a variable ?A variable can be taken as a letter or number or a symbol which is not fixed that mean its value may be change any time .
What is an expression?An expression is consist of multiple symbols, letters or numbers .Expression is a proper mathematical statement consist of single letter or may be multiple letter combine with some operators.
What is a term?It can be a constant or a variable or both.
What is a constant?A constant is a letter or symbol whose value is fixed always.
In the given question,
As, Seven is a single digit number therefore it is a fixed value which can not change. Thus it is clear that seven is a constant . Also, seven is a term and an expression as well , as it denotes the mathematical value.
Thus, seven is not an example of variable.
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The complete question is :
Seven is not an example of _____.
A) an expression B) term C) variable D) constant
Name any 2 supplementary angles that equal 180 degrees
Answer:
100 degrees and 80 degrees
Step-by-step explanation:
Supplementary angles are two angles that add up to 180 degrees when combined.
Answer:
angle B= 95
angle D= 85
Step-by-step explanation:
first person who awnsers gets brainlist
Please check the attached image for the answer. Hope this helps :)
3QWz4exrtv7y8huji0ko,pminbyutcr
Wha..?
............................................................................................
Crystal pls help again
Answer:
I think its 63 degrees.
Answer:
63
Step-by-step explanation:
In a triangle, all interior angles add up to 180
47+70+x=180
x=63
(picture included) brainliest
Answer: 20
Step-by-step explanation: