I don’t know the answer

I believe the answer is -1.

Step-by-step explanation:

So I distributed,

2 x 2 = 4

x 2 =

x 2 =

x = -5

4 + - 5 = ?

the radicals cancel out and 4 -5 = -1

d (5 x (-20)) * (100 x (0.7))

step-by-step explanation:

5÷1/100 * -.7 *-20

copy dot flip

5*100 * -.7 *-20

rearrange

5*-20   * 100 *-.7

-100   *-70

7000

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.