30 ÷ [(15 − 7) − (8 − 5)]

So the right answer is 6.

Look at the attached picture

Hope it will help you....

Good luck on your assignment

6

Step-by-step explanation:

30 ÷ [(15 − 7) − (8 − 5)]

30 ÷{[15-7]=8-[8-5]=3}

30÷[8-3]

30÷5=6

x > 1.3

step by step:

8.5−0.9x> 9.8−1.9x

step 1: simplify both sides of the inequality.

−0.9x+8.5> −1.9x+9.8

step 2: add 1.9x to both sides.

−0.9x+8.5+1.9x> −1.9x+9.8+1.9x

1x+8.5> 9.8

step 3: subtract 8.5 from both sides.

1x+8.5−8.5> 9.8−8.5

1x> 1.3

step 4: divide both sides by 1.

1x/1 > 1.3/1