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3 years ago

Shade the grid to represent the ratio. Then find the missing number. 11/20 = __/100

Mathematics

1 answer:

Lemur [1.5K]3 years ago

4 0

Answer: The missing number is 55

The denominators are 20 and 100. We multiply by 5 to jump from the smaller denominator to the larger.

Do the same for the numerators

11*5 = 55

Or you can solve the proportion below for x

11/20 = x/100

11*100 = 20*x

1100 = 20x

20x = 1100

x = 1100/20

x = 55

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What is x? -2.5x- 2=18

snow_tiger [21]

Answer:

x = -8

Step-by-step explanation:

-2.5x - 2 = 18.

Add 2 to both sides.

-2.5x = 20.

Divide both sides by -2.5.

x = -8

3 0

2 years ago

Essential: Solve the proportions<br> step by step

vazorg [7]

Answer:

The value of r= $\frac{-106}{47}$

The value of x= $\frac{83}{32}$

Step-by-step explanation:

Given that,

A) $\frac{2r-2}{7r+10} = \frac{9}{8}$

Now,

$\frac{2r-2}{7r+10} = \frac{9}{8}$

8(2r-2)=9(7r+10)

16r-16=63r+90

-16-90=63r-16r

-(16+90)=47r

-106=47r

r= $\frac{-106}{47}$

B) $\frac{x+4}{9} = \frac{3(x-2)-1}{5}$

Now,

$\frac{x+4}{9} = \frac{3(x-2)-1}{5}$

5(x+5)=9[3(x-2)-1]

5x+25=9[3x-6-1]

5x+25=9[3x-7]

5x+25=27x-63

25+63=27x+5x

83=32x

x= $\frac{83}{32}$

6 0

3 years ago

51 is 33 1/3 of what number?

Makovka662 [10]

1700, just use the inverse operation. The problem would look like this ( not inverse operation ) x ÷ 33 1/3 = 51

All you have to do is multiply the two numbers.

51 x 33 1/3 = 1700

Now plug it back in and check

1700 ÷ 33 1/3 does indeed equal 51.

5 0

2 years ago

4.00 is what percent of 50.00

DiKsa [7]

$Make\ a\ fraction\ \frac{4}{50}\ and\ multiply\ by\ 100\%\\\\
\frac{4}{50}*100\%=\frac{400}{50}\%=8\%\\\\
4\ is\ 8\%\ of\ 50.$

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2 years ago

A cell phone was on sale 30% off.The sale price was $239.89 .what was the original price of the phone

klasskru [66]

Answer: $167.92

239.89×0.70=167.923

I got the 70 from 100-% off (100-30)

May I ask where this phone is? I need a new one :)

4 0

3 years ago