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miss Akunina [59]
3 years ago
14

Maria scored 72, 97, and 82 on her first three math tests. She wants to have a mean score of 82 for the quarter. How many points

does she need on her last test to earn an 82 for the quarter
Mathematics
2 answers:
ki77a [65]3 years ago
6 0
77 points. 82*4=328 328-72-97-82=77 You can check this by adding 77,72,97, and 82, and divide it by 4
Rom4ik [11]3 years ago
3 0

Answer:

<em>She needs </em><em>77 </em><em>on her last test to earn an 82 for the quarter.</em>

Step-by-step explanation:

Maria scored 72, 97, and 82 on her first three math tests.

She wants to have a mean score of 82 for the quarter.

Let us assume that she must score x on her last test to earn an 82 for the quarter.

So the average score will be,

=\dfrac{72+97+82+x}{4}

But the average score is given as 82, so

\Rightarrow \dfrac{72+97+82+x}{4}=82

\Rightarrow 72+97+82+x=82\times 4

\Rightarrow 72+97+82+x=328

\Rightarrow x=328-72-97-82

\Rightarrow x=77

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Compute<br><br> 8*4-4 divided by 2 +1
iragen [17]

Solution of 8 x 4 - 4 divided by 2 +1 is 9.33

<h3><u>Solution:</u></h3>

Given that,

8 x 4 - 4 divided by 2 +1

We have to compute the above equation

Let us write the given sentence mathematically:

\rightarrow \frac{8 \times 4-4}{2 + 1}

Let us BODMAS rule to solve the above expression

According to Bodmas rule, if an expression contains brackets ((), {}, []) we have to first solve or simplify the bracket followed by of (powers and roots etc.), then division, multiplication, addition and subtraction from left to right.

So let us first perform multiplication of 8 and 4 in numerator

\rightarrow \frac{32 - 4}{2 + 1}

Now we can perform addition of 2 and 1 in denominator

\rightarrow \frac{32-4}{3}

Now we can perform subtraction of 4 from 32 in numerator

\rightarrow \frac{28}{3}

Now perform division of 28 by 3

\rightarrow \frac{28}{3} = 9.33

Thus solution of 8 x 4 - 4 divided by 2 +1 is 9.33

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3 years ago
Middle school mathematics 5 points a box of cereal states that there are 75 calories in a 3/4-cup serving. what is the unit rate
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Margo can purchase tile at a store for $0.79 per tile and rent a tile saw for $24. At another store she can borrow the tile saw
KATRIN_1 [288]

Margo must buy 60 tiles for the cost to be the same at both stores.

Step-by-step explanation:

Let x be the number of tiles purchased

Then

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24+0.79x

For store 2:

1.19x

For the number of tiles, we have to put both expression equal

24+0.79x = 1.19x

subtracting 24 from both sides

24+0.79x-24 = 1.19x-24\\0.79x=1.19x-24

Subtracting 1.19x from both sides

0.79x-1.19x = 1.19x-24-1.19x\\-0.4x = -24

Dividing both sides by -0.4

\frac{-0.4x}{-0.4} = \frac{-24}{-0.4}\\x  =60

Hence,

Margo must buy 60 tiles for the cost to be the same at both stores.

Keywords: Linear equations

Learn more about linear equations at:

  • brainly.com/question/10666510
  • brainly.com/question/10699220

#LearnwithBrainly

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