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Ann [662]
3 years ago
10

Lynn has grades of 93, 75, and 86 on three math tests. What grade must she make on the next test to have an average of exactly 8

1 for the four tests?
Mathematics
1 answer:
deff fn [24]3 years ago
5 0
(93+75+86+x)/4=81
93+75+86+x=324
The sum of the scores is 324. Now solve for x:
254+x=324
x=70

The answer is 70
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Rational numbers with distribute property
Svetradugi [14.3K]

I'm not sure what this means. If you have choices you should list them.

(1/2)*(1/4 + 1/6) is an example of what should be given. There are two ways to solve this.

1. Use the distributive property.

1/2*1/4 + 1/2* 1/6

1/8 + 1/12 Which can be added using the LCD of 24

3/24 + 2/24 = 5/24

Method 2

Add what is inside the brackets first.

1/2 ( 1/4 + 1/6)

1/2(3/12 + 2/12 = 5/12

Now multiply by 1/2

1/2(5/12) = 5*1/(12 * 2) = 5 / 24 Same answer.

4 0
3 years ago
To compute the area of a rectangle, you need to use the formula A=l.w if the length is 2 3/4 inches and the width is 4 1/2 inche
blagie [28]

Answer:

12 3/8

Step-by-step explanation:

A = 2 3/4 x 4 1/2

best way is to change mixed numbers to fractions and multiply and then go back to a mixed number.

11/4 x 9/2 = 99/8 = 12 3/8

8 0
3 years ago
Use cosines to find the measure of angle B<br> A=16, B=22, C=21
romanna [79]

Answer:

more info please\

Step-by-step explanation:

5 0
3 years ago
While driving to a work site, Ross realized he was almost out of gas, so he stopped at a gas station to fill up his truck. The t
HACTEHA [7]

Answer:

Independent: g

Dependent: c

The cost of the gas depends on the amount he pumps

7 0
3 years ago
At a certain college, 28% of the students major in engineering, 18% play club sports, and 8% both major in engineering and play
Alex

Answers: 0.286

Explanation:

Let E → major in Engineering

Let S → Play club sports

P (E) = 28% = 0.28

P (S) = 18% = 0.18

P (E ∩ S ) = 8% = 0.08

Probability of student plays club sports given majoring in engineering,

P ( S | E ) = P (E ∩ S ) ÷ P (E) = 0.08 ÷ 0.28 = 0.286

8 0
3 years ago
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