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3 years ago

Two angles are comlementary. the first angle measures x and the second angle measures 3x-10. find x?

Mathematics

1 answer:

ryzh [129]3 years ago

6 0

X=25

4x-10=90
Add 10 to both sides
4x=100
Divide both sides by 4

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Select the property of equality used to arrive at the conclusion. If x = 3, then x 2 = 3x

VARVARA [1.3K]

I think it would be the Multiplication property of equality

4 0

3 years ago

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A right cylinder has a radius of 6 m and a surface area of 84 m². Find the surface area of a similar cylinder with a radius of 2

dlinn [17]

Answer:

The surface area of the second cylinder is equal to $9.33\ m^{2}$

Step-by-step explanation:

we know that

If two figures are similar then

the ratio of their surfaces areas is equal to the scale factor squared

Let

z-------> the scale factor

x------> the surface area of the smaller cylinder (second cylinder)

y-------> the surface area of the original cylinder (first cylinder)

$z^{2}=\frac{x}{y}$

Step 1

Find the scale factor

$z=\frac{2}{6}=\frac{1}{3}$

Step 2

Find the surface area of the second cylinder

we have

$z=\frac{1}{3}$

$y=84\ m^{2}$

substitute and solve for x

$(\frac{1}{3})^{2}=\frac{x}{84}$

$x=\frac{1}{9}*84=9.33\ m^{2}$

5 0

2 years ago

Please answer this correctly

vazorg [7]

Answer:

8 and 3

Step-by-step explanation:

11+11=22

That means that the perimeter is 22.

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3 years ago

How many terms are there in the following expression? x - 5 + 16x + 4 - 2x - 3

k0ka [10]

Answer:

Two terms

Step-by-step explanation:

First, we have to simplify reducing the number of terms, since there are like terms

x-5+16x+4-2x-3

Eventually, you'll get 15x-4, thus there are two terms.

Please correct me if I'm incorrect, and I'll change the answer, but I hope I helped :)

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2 years ago

Mr and mrs Jackson have 14 grandchildren. Find the ratio of girls to boys if there are four more girls than boys

natulia [17]

Answer:

5 boys to 9 girls

Step-by-step explanation:

Let x = the number of boys

Boys = x

Girls = x + 4

x + (x + 4) = 14

2x + 4 = 14

2x = 10

x = 5

This means that there are 5 boys. Since girls = x + 4, 5 + 4 = 9. There are 5 boys and 9 girls.

I hope this helped and please mark me as brainliest!

6 0

1 year ago

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