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Nat2105 [25]
3 years ago
9

50 PTS+ BRAINLIEST FOR CORRECT ANSWER

Mathematics
2 answers:
Flura [38]3 years ago
8 0

Answer:

jane is 28 and karen is 7

Step-by-step explanation:

j=4k

j-k=21

set the values of j equal to each other

4k=21+k

solve for k, you get 7

four times 7 is 28

Fudgin [204]3 years ago
7 0

Answer:

J = 28 and K = 7

Step-by-step explanation:

J = Jane

K = Karen

J = 4 * K

J - K = 21

4K - K = 21

3K = 21

K = 7

J = 4K

J = 4(7)

J = 28

Hope this helps :)

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In a mathematics class, half of the students scored 87 on an achievement test.
Nimfa-mama [501]

The complete question is:

In a mathematics class, half of the students scored 87 on an achievement test. With the exception of a few students who scored 52, the remaining students scored 71. Which of the following statements is true about the distribution of scores?

A. The mean is less than the median.

B. The mean and the median is the same.

C. The mean is greater than the mode.

D. The mean is greater than the median.

Statistics exist in the analysis of collection, analysis, interpretation, and presentation of data or into discipline to collect and summarize the data.

Therefore, the correct answer is option A. The mean is less than the median.

<h3>What are statistics?</h3>

Statistics exist in the analysis of collection, analysis, interpretation, and presentation of data or into discipline to collect and summarize the data.

Half the students scored 87.

The next highest score exists at 71.

Then the median will be (71+ 87) / 2 = 79

A few students scored 52, so the mean exists a little lower than the mean of 71 and 87.

Therefore, the correct answer is option A. The mean is less than the median.

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3 0
1 year ago
Find four consecutive integers such that twice the sum of the first and third is
disa [49]

Answer:

Hi,Can You answer mine too please I really need the answer because I have to pass it tomorrow morning at my 1st class:(can you please check my question I'll mark you BRAINLIEST:)I hope you can help me:)

Step-by-step explanation:

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A married couple had a combined annual income of 63,000. The wife made 7,000 more than her husband. What was each of their incom
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You work two jobs. You earn $11.90 per hour as a salesperson and $10.50 per hour stocking shelves. Your combined earnings this m
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5 0
3 years ago
The graph of a quadratic function has a vertex at (5,3) and goes through the point (-1,-9). What is the equation of the function
kotegsom [21]

Answer:

y=-\frac{1}{3} (x-5)^2+3

Step-by-step explanation:

We are given the following;

  • Vertex of a quadratic function = (5,3)
  • A point where the function passes through (-1, -9)

Required to determine the equation of the function;

  • We need to know the vertex form of a quadratic function is;

y=a(x-h)^2+k, where h and k correspond to the vertex (h,k)

  • Therefore, we can replace the variables h and k of the vertex in the equation;

That is;

y=a(x-5)^2+3

Then we use the equation and the point given to solve for a

x = -1 and y = -9

We get;

-9=a(-1-5)^2+3\\-9 = a(36) + 3\\-9 - 3 = 36a\\-12 =36a \\a=-\frac{1}{3}

Substituting the values of a, h and k in the equation, we get;

y=-\frac{1}{3} (x-5)^2+3

Thus, the equation of the function in the vertex form is y=-\frac{1}{3} (x-5)^2+3

8 0
3 years ago
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