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2 years ago

Plz solve this inequality

Mathematics

1 answer:

nasty-shy [4]2 years ago

8 0

Answer:

$\{r | r \ge -3 \}$

Step-by-step explanation:

$7 - 9r - (r + 12) \le 25$

Remember that to deal with the negative sign to the left of the parentheses, you must think of it as a -1 multiplying the parentheses, and you distribute the -1 by multiply each term inside the parentheses by -1. That changes all the signs inside the parentheses.

$7 - 9r - r - 12 \le 25$

Combine like terms on the left side.

$-10r - 5 \le 25$

Add 5 to both sides.

$-10r \le 30$

We now divide both sides by -10. Remember that when you divide both sides fo an inequality by a negative number, the inequality sign changes direction.

$r \ge -3$

Answer: $\{r | r \ge -3 \}$

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3 years ago

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3 years ago

Show all work:

DerKrebs [107]

Answer:

m=-3

Step-by-step explanation:

m - 7 = -10

Ok so,

in order to get m by itself you just need to do the opposite of -7 which is +7 so you have to add 7 to both sides. On the left, both of the 7's cancel out and on the right -10 + 7 = -3. So, now it should look like this.

m=-3

To check you just need to plug in -3 into the question

Hope this helps! Have a good day

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