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Luda [366]
3 years ago
7

Kevin will take 4 math tests this term. All of the tests are worth the same number of points. After taking the first 3 tests, hi

s mean test score is 88 points. How many points does he need on his last test to raise his mean test score to 90 points?
Choose the sentence that describes how the quantities in the problem are related.
CHECK

The mean score is the total of all scores minus the number of tests taken.


The total of the scores multiplied by the number of tests taken is the mean score.


The mean score is the total of all scores divided by the total number of tests.


The total of Kevin’s scores is the mean score divided by the number of tests taken.
Mathematics
2 answers:
DiKsa [7]3 years ago
4 0

Answer:

Let the test scores be x1, x2, x3, x4

(x1 + x2 + x3)/3 = 88

x1 + x2 + x3 = 264

(x1 + x2 + x3 + x4)/4 = 90

264 + x4 = 360

x4 = 360-264

x4 = 96

Therefore he should get 96 marks in his 4th test to raise his mean test score to 90

The mean score is the total of all scores divided by the total no. Of tests

Hope this helps!

Nataly_w [17]3 years ago
4 0

Step-by-step explanation:

Answer:

Let the test scores be x1, x2, x3, x4

(x1 + x2 + x3)/3 = 88

x1 + x2 + x3 = 264

(x1 + x2 + x3 + x4)/4 = 90

264 + x4 = 360

x4 = 360-264

x4 = 96

Therefore he should get 96 marks in his 4th test to raise his mean test score to 90

The mean score is the total of all scores divided by the total no. Of tests

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The lemonade recipe calls for 4 scoops of lemonade powder for each quart of water. Each quart is equivalent to 4 cups. Let n rep
tia_tia [17]

Answer:

B. 5 ≤ n≤ 8

f. 10 ≤ S ≤ 16

C. c=2n

d. S = c

Step-by-step explanation:

Jada is making lemonade for a get together with her friends. She expects a total of 5 to 8 people to be there (including herself).?

She plans to prepare 2 cups of lemonade for each person. The lemonade recipe calls for 4 scoops of lemonade powder for each quart of water. Each quart is equivalent to 4 cups. Let n represent the number of people at the get together, c the number of cups of water, S the number of scoops of lemonade powder. Select all the mathematical statements that repsent the quantities and constraints in the situation.

A. 5<n<8

B. 5≤ n≤8

C. c=2n

d. S = c

e. 10<c<16

f. 10≤S≤16

Let

n = number of people at the get together,

c = number of cups of water,

S = number of scoops of lemonade powder.

She expects a total of 5 to 8 people to be there (including herself).

B. 5 ≤ n ≤ 8

She plans to prepare 2 cups of lemonade for each person.

With minimum of 5 people and maximum of 8 people

2 × 5 = 10

2 × 8 = 16

f. 10≤S≤16

The number of cups of water is twice the number of people at the party

C. c=2n

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alexgriva [62]

Answer:

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Step-by-step explanation:

2,000 is 10% of 20,000

3.5 is 10% of 35



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3 years ago
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