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Marrrta [24]
3 years ago
12

21 is 15% of what number?

Mathematics
1 answer:
Gnoma [55]3 years ago
7 0
You do it like this:
15/100 = 21/x and cross multiply like this:
15x = 2100 ((Divide by 15 on both sides)
x = 140 (This is your answer)
I hope this helps you! Have a great night!

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A square pyramid has a base length of 6 inches. The height of each triangular face is 11 inches. Which expressions correctly cal
VMariaS [17]

Answer:

168 in²

Step-by-step explanation:

The square would be 36 in²

Area of a triangle is A= 1/2 bh

A = 1/2 (11 x 6), A= 1/2 (66)

1/2 (66) = 33 in², which is the area of a triangle.

Then you multiply 33 x 4 to get the area of all the triangles, which is 132 in²

You add the area of the square to the area of the triangles, which is 168 in².

7 0
3 years ago
Carlos earns $11 per hour at his job. Let x represent the number of hours he worked in May. Let y represent the number of hours
Firlakuza [10]

11x+11y

11(x+y)

Explanation

Step 1

Let

Carlos earns == 11 per hour

x represents the number of hours he worked in May

the,

the amount he earned in Mayis

11\cdot x=11x

y represent the number of hours he worked in June.

the amount he earned in June was

11\cdot y=11y

Step 2

the amount of money he earned is May and June is the sum of the values

\begin{gathered} \text{total}= \\ 11x+11y \\ \text{if we factorize 11} \\ 11(x+y) \end{gathered}

I hope this helps you

5 0
1 year ago
The equation A = x(x - 7) describes the area, A, of a rectangular flower garden, where x is the width in feet.
mamaluj [8]

x(x-7)=8

x^2-7x-8=0

(x-8)(x+1)=0

so x=8 (and -1 but width can’t be negative)

So your answer is C. 8

8 0
3 years ago
Combine like terms: 80 + 50m + 65 + 40m​
Nuetrik [128]

Answer:

90m+145

Step-by-step explanation:

80 + 50m + 65 + 40m​

90m+145

3 0
2 years ago
If a×b÷2=a÷2 then b =​
lbvjy [14]
If a×b÷2=a÷2 then b = 1
8 0
2 years ago
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