PLEASE HELP ME there’s a photo:

Mathematics

2 answers:

Lilit [14]3 years ago

8 0

It's the first one, an algebraic expression contains variables

Nezavi [6.7K]3 years ago

6 0

I think the only statement that IS NOT true is the last one. See if this helps

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Please help, seriously confused

Rufina [12.5K]

Original height = original width = x mm

1. She made an enlarged copy...
height = 2x
width = 2x

2. She cut off a rectangle...
height = 2x
width = $\frac{2}{3} *2x= \frac{4}{3}x$

3.She doubled the width...
height = 2x
width = $2*\frac{4}{3}x = \frac{8}{3}x$

height * width = area

$2x * \frac{8}{3}x=139 \ 968 \\ \\ \frac{16}{3}x^2= 139 \ 968 \\\\ x^2=139 \ 968: \frac{16}{3}=139 \ 968 * \frac{3}{16}= 8 \ 748*3 = 26 \ 244 \\ \\ x= \sqrt{26 \ 244} = 162 \ mm$

Original height was 162 mm

6 0

3 years ago

Hurry in test Brainliest!!!

tamaranim1 [39]

Answer:

Step-by-step explanation:

m = $\frac{y_{2} - y_{1} }{x_{2} -x_{1} }$

(- 2, - 10)

(4 , - 4)

m = $\frac{-4+10}{4+2}$ = 1

y + 4 = (x - 4) ⇒ <em>y = (x - 4) - 4</em>

5 0

3 years ago

Solve 3(x + 2) > x.

Georgia [21]

3(x + 2) > x
3x + 6 > x
3x - 3x + 6 > x - 3x
6 > -2x
6/-2 < -2x/-2
-3< x
(When dividing by a negative, reverse the direction of the inequality side, reverse it EVERY time you divide by a negative)

ANSWER: -3 < x

5 0

3 years ago

The number 512 is a perfect cube because 512 = 83.

alexgriva [62]

Step-by-step explanation:

the number which is a perfect cube :

125, because 125 = 5³