Question

Can someone help me on this please?

Answer 1

x > -1

10 ≤ d

k ≤ -24

Explanation:

a)

First, we need to isolate the variable, for that we follow these steps

13 + 4x > 9

• Subtract 13 from both sides

4x > -4

• Divide both sides by 4

x > -1

b)

We can solve this using the same method we used with finding x:

99 - 5d ≤ 4d

• Add 5d to both sides

99 ≤ 9d

• Divide both sides by 9

10 ≤ d

c)

Now onto the value of k:

3k - 9 ≤ -6k - 225

• Transfer like terms to the same side of the inequation

3k + 6k ≤ 9 - 225

• Add/subtract

9k ≤ -216

• Divide both sides by 9

k ≤ -24