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77julia77 [94]
3 years ago
5

Mr. X has 12 students in his math class. Last Friday they took a test covering everything that they have learned in math class s

ince school began. One third of the students made a C, one fourth of the students made a B, one sixth of the students made an A, and the rest made a D. How many students made a grade B?
Mathematics
2 answers:
kaheart [24]3 years ago
8 0
3 students made a B as a grade.
Ierofanga [76]3 years ago
6 0
1/4 of the students have a B, so there are 12 people in the class so what you would do is divide 12 by 4 and get an answer of 3 so 3 people got a B
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What is the area of a rectangle whose length is 3x and breadth is 2x
kherson [118]

Answer:

Your answer is <em>6x</em>

Step-by-step explanation:

Given,

          length(l)     = 3x

          breadth(b) = 2x

          area of a rectangle(A) = ?

Now,

A = l*b

A = 3x*2x

A = 6x    ans.

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2 years ago
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For Jason, it takes 3 hours to clean the attic. However, Sara takes 6
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2

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3 years ago
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Drupady [299]

A table of values can be used to represent variables that are directly proportional.

The complete table of proportions is:

\left[\begin{array}{ccccccccc}Letters&10&2&[150 ]&7&1&500&[420] \\Cost&0.45&0.90&6.75&[0.315]&[0.045 ]&[22.5 ] & 18.90\end{array}\right]

Given that

\left[\begin{array}{ccccccccc}Letters&10&2&[\ ]&7&1&500&[\ ] \\Cost&0.45&0.90&6.75&[\ ]&[\ ]&[\ ] & 18.90\end{array}\right]

Let:

<em />L \to<em> Letters</em>

<em />C \to<em> Cost</em>

<em />

Using proportional reasoning, we have:

C  = kL

Where

<em />k \to<em> ratio of proportion</em>

For the first values of C and L, we have:

C  = kL

0.45 = k \times 10

Divide both sides by 10

k = 0.045

So, the equation of proportion is:

C = 0.045L

<u>When C = 6.75, we have:</u>

C = 0.045L

6.75 = 0.045L

Solve for L

L = \frac{6.75}{0.045}

L = 150

<u>When L = 7, we have:</u>

C = 0.045L

C = 0.045 \times 7

C = 0.315

<u>When L = 1, we have:</u>

C = 0.045L

C = 0.045 \times 1

C = 0.045

<u>When L = 500, we have:</u>

C =0.045L\\

C =0.045 \times 500

C =22.5

<u>When C = 18.90, we have:</u>

C = 0.045L

18.90 = 0.045L

Solve for L

L=\frac{18.90}{0.045}

L=420

Hence, the complete table is:

\left[\begin{array}{ccccccccc}Letters&10&2&[150 ]&7&1&500&[420] \\Cost&0.45&0.90&6.75&[0.315]&[0.045 ]&[22.5 ] & 18.90\end{array}\right]

Read more about proportions at:

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What is the rule for 0.7, 1.7, 2.7, 3.7
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We need to evaluate the value of fraction \frac{j}{4}.

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We have 12 in numerator and 4 in denominator.

We always divide top number by bottom number.

So, we need to divide 12 by 4.

On dividing 12 by 4 we get 3.

<h3>Therefore, \frac{j}{4} = 3.</h3>
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3 years ago
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