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3 years ago

Solve. Use the basic percent equation. 212.5 is 85% of what?

Mathematics

1 answer:

uranmaximum [27]3 years ago

6 0

Answer:

250

Step-by-step explanation:

85% · n = 212.5

[convert 85% to .85]

.85n = 212.5

n = 212.5/.85

n = 250

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Find the sum and express it in simplest form. (ab+4a-6)+(ab+6)

riadik2000 [5.3K]

= 2ab + 4a + 6 - 6

= 2ab + 4a

you can factor this to 2a(b + 2)

3 0

3 years ago

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Solve 2x-3< 2 please answer it fast

murzikaleks [220]

Answer:

x<5/2

Step-by-step explanation:

We have

2x−3<2

Add 3 to both sides.

2x−3 +3 <2 +3

which makes

2x<5

Divide both sides by 2.

2x/2 < 5/2

x<5/2

4 0

3 years ago

It is given that y varies inversely as x^2. If x is decreased by 50%, find the percentage change in y.

vova2212 [387]

Answer:

300%

Step-by-step explanation:

Given

$y\ \alpha\ \frac{1}{x^2}$

Required

Find the percentage change in y when x decreased by 50%

First, convert to equation

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

Where k is the constant of proportionality

When x decreased by 50%

$Y = \frac{k}{(x - 0.5x)^2}$

$Y = \frac{k}{(0.5x)^2}$

$Y = \frac{k}{0.25x^2}$

Expand

$Y = \frac{1}{0.25} * \frac{k}{x^2}$

Substitute $\frac{k}{x^2}$ for y

$Y = \frac{1}{0.25} * y$

$Y = 4 * y$

$Y = 4 y$

The percentage change is then calculated as:

$\%Change = \frac{Y - y}{y} * 100\%$

$\%Change = \frac{4y - y}{y} * 100\%$

$\%Change = \frac{3y}{y} * 100\%$

$\%Change = 3 * 100\%$

$\%Change = 300\%$

The percentage in y is 300%

7 0

3 years ago

I need help! Please help me and tell me how you got the answer. Will mark brainlist!

Serggg [28]

Answer:

3. V= 192

4. V= 32

Step-by-step explanation:

first, find the area of the base by multiplying length by width.

Once you determine the area of the base, multiply that by height

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3 years ago

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Kakapalan kona po mukha ko pasagot po please

Pie

Answer:

1. 3/7

2.6/10

3.17/12

4.41/42

5.4/10

6.10/7

hopefully this helped :)

pls mark me as the brainliest

4 0

3 years ago