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Marat540 [252]
3 years ago
9

steve has quiz scores of 60,64,75,71. If all the quizzes count the same, what is the lowest grade he can make on the next quiz t

o have an average score of 70? how do i solve this problem
Mathematics
1 answer:
NeX [460]3 years ago
7 0

Answer:

The last quiz score must be at least an 80 to get the average to be a 70.

Step-by-step explanation:

In order to find this, you need to take the average of the 4 test scores along with the unknown test score (x). So, to find an average, we add all the numbers together and divide by the amount of tests taken. We can then set this equal to 70 since that is the minimum average.

(60 + 64 + 75 + 71 + x)/5 = 70 ------> Multiply both sides by 5

(60 + 64 + 75 + 71 + x) = 350 -----> Combine like terms

270 + x = 350 -----> Subtract 270 from both sides

x = 80

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As part of a study on facility needs, the administrators of a university wanted to estimate the percent of students who use the
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Population is 34000 students

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Step-by-step explanation:

Population :In statistics, a population is the entire pool from which a statistical sample is drawn.

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We are given that 34,000 students attended the university.

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4 0
3 years ago
Brenda has two pieces of string, one 28 feet long and the other 42 feet long. For an art project, she wants to cut them up to pr
NeTakaya

Answer:

7 feet

Step-by-step explanation:

Length of one piece of string = 28 feet.

Length of the second string = 42 feet.

Since the number of required pieces was not given but many are required, the greatest length can be determined by;

If the maximum length is 7 feet, then:

the number of pieces from 28 feet long string = \frac{28}{7}

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Also,

the number of pieces from the 42 feet lone string = \frac{42}{7}

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Since many pieces are required, the greatest length she can make is 7 feet. If she increase the length to 14 feet, the number of pieces would be 5 which limit the required number.

3 0
2 years ago
What is the sum of 2 5/6 + 1 2/6
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Answer:

5 miles per hour.

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= 6 / 6/5

= 6 * 5/6

= 5 miles per hour.

8 0
3 years ago
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