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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?

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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3 years ago

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Please explain 22 and 23

ICE Princess25 [194]

Hey there!

$\bold{Mean\rightarrow your \ average}$
$\bold{The\ word \ 'average' \ means \rightarrow}$ $\bold{is \ where \ you \ add \ up \ your \ particular \ numbers \ \& you}$ $\bold{divde \ your \ result \ by \ the \ number!}$

$\bold{22.\downarrow}$

If we're rounding the answer then: $\boxed{\bold{answer:90}}$ $\checkmark$

$\bold{23.\downarrow}$

Another name for the word is "range" so, $\boxed{\bold{answer:11}}$ $\checkmark$

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~ $\frak{LoveYourselfFirst:)}$

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3 years ago

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Step-by-step explanation:

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3 years ago

What is the most logical first step in solving the equation x2+6x+9=10?

valentina_108 [34]

You need to make the right side = 0
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x^2 + 6x + 9 - 10 = 10 - 10
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