2 years ago

How do you find the area of a cube measuring 3ft it has 7sides

Mathematics

1 answer:

RUDIKE [14]2 years ago

4 0

3 times 7= 21 times three =63

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Answer:

Only 4 is the right answer. The rest all are false.

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Without using a calculator, match each expression to the correct point. Point Expression

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Step-by-step explanation:

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2 years ago

A-t shirt cost $4 a sweter cost 4 times as much as the t-s

slava [35]

T-shirt costs $4
Sweater costs $4(4)

Sweater costs 4 x 4

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Sweater costs $16

hope this helps

5 0

2 years ago

Read 2 more answers

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

2 years ago

7.22 (10b-3) =7b-14

faust18 [17]

Multiply 7.22 onto 10b and -3
new equation - 72.2b-21.66=7b-14

add 21.66 onto -14
new equation - 72.2b=7b+7.66

subtract 7b from 72.2
new equation: 65.2b=7.66

divide 65.2 from b
new equation: b=7.66/65.2

final answer: b=0.117

3 0

3 years ago