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3 years ago

20 POINTS!!!!!! help asap

Mathematics

2 answers:

dexar [7]3 years ago

4 0

Its the 2 one hope i help

bulgar [2K]3 years ago

3 0

The answer is B on edgeinuity

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A square has a side length 9 cm. What is its area? A square has an area of 9 cm2. What is its side length?

Kay [80]

Answer:

Area = 81; Side Length = 3

Step-by-step explanation:

The area of a square is the side lenght squared, and 9² is 81.

The side lengh can be found by taking the square root of the area. √9 = 3

5 0

3 years ago

PLS HELPPP

Morgarella [4.7K]

Answer:

d. (9,-260°)

Step-by-step explanation:

100° = 100-360 = -260°

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3 years ago

Which point represents an approximate solution to this system of equations?

joja [24]

The answer is D. (2.9,-22.8)

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3 years ago

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Please Help!!! Will Give brainliest!!

Nataly [62]

Answer:

B?????

Step-by-step explanation:

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3 years ago

How to solve the system of equation 500y-600x=2800 , 400y-400x=2400 by elimination

tatiyna

Answer:

$x=2$ and $y=8$

Step-by-step explanation:

Given:

Equation 1:

$500y-600x=2800$

Simplifying the above equation by dividing both sides by 100

$\frac{500y-600x}{100}=\frac{2800}{100}$

$\frac{500y}{100}-\frac{600x}{100}=28\\\\5y-6x=28$

Equation 2:

$400y-400x=2400$

Simplifying the above equation by dividing both sides by 400.

$\frac{400y-400x}{400}=\frac{2400}{400}$

$\frac{400y}{400}-\frac{400x}{400}=6\\\\y-x=6$

Now the system of equation is:

(1a) $5y-6x=28$

(2a) $y-x=6$

Solving by elimination

Multiplying equation (2a) with $-5$

$-5(y-x)=-5\times 6$

(2b) $-5y+5x=-30$

Adding equations (1a) and (2b) in order to eliminate $y$

$5y-6x=28$

+ $-5y+5x=-30$

We get $-x=-2$

∴ $x=2$

Plugging $x=2$ in equation (2a).

$y-2=6$

Adding $2$ both sides.

$y-2+2=6+2$

∴ $y=8$

7 0

3 years ago