Number 9, c, e, f can anyone me solve them

9. c.

9. e.

9. f.

Step-by-step explanation:

9. c. Given

Rewrite it as follows:

This inequality is equivalent ot the double inequality

Add 4:

But the absolute value |2x| is always no less than 0, so

9. e. Given

This inequality is equivalent to

So,

9. f. Given

Add 1:

This inequality is equivalent to

So,

answer: the area of the parallelogram below is 42 square meters.

- officialprodixy ☕

1) c 2143.6 cm

2) c 113.0 m

3) a 33.5 ft

4)   d 2 cm

5) c 20 mm

6) 180 in

7) d 120 ft