3 years ago

Can someone please help me with this? this is solving systems of linear equations algebraically

Mathematics

1 answer:

Nezavi [6.7K]3 years ago

6 0

Answer:

a=12

b=9

Step-by-step explanation:

3/4 of 12 is 9 and 9 plus 12 is 21

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The area of a rectangle is 72cm2, in which the width is twice the length. what are the dimensions

Blizzard [7]

Answer:

Dimension: 2inches by 4 inches

Step-by-step explanation:

Given

$Width = 2wice\ Length$

Required

Determine the dimension.

This is calculated as :

$Area = Length * Width$

$A = L * W$

So:

$A=L * 2L$

$A=2L^2$

Substitute 72 for A

$72=2L^2$

Divide bith sodes by 2

$36 = L^2$

Take square root of both sides

$L = 6$

Recall that:

$Width = 2 * Length$

Hence:

$LEnhth= 0 * 2$

$LEnhth= 2$

Hence, the dimension is: 2 by 3 inches

6 0

3 years ago

A computer downloads a 48 kilobyte file in 5 seconds. At this rate, how long will it take the computer to download a file that i

docker41 [41]

The answer is 12.5 seconds.

48/5 = 120/x
x = 2.5
2.5 * 5 = 12.5

4 0

3 years ago

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Need help please!

harkovskaia [24]

Sounds like 2 parallel lines.

Consider

2x-3y = 5

and

2x-3y = 7

These lines have the same slope and are thus parallel. Parallel lines never intersect. So there is no algebraic or graphical solution.

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3 years ago

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What are all the numbers you can build (up to 50) that include 5 as a prime factor?

stepladder [879]

Count by 10s that's how

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3 years ago

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The area of a pizza is 616 square centimeters.

Thepotemich [5.8K]

Well $A= \pi r^2$
$616= \pi r^2$
$\frac{616}{\pi} =r^2$
$\sqrt{\frac{616}{\pi}} =r$
$\sqrt{\frac{616(7)}{22}} =r$
$14=r$

3 0

4 years ago

Can someone please help me with this? this is solving systems of linear equations algebraically​

Can someone please help me with this? this is solving systems of linear equations algebraically