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DanielleElmas [232]
3 years ago
15

I need help!!!! Please

Mathematics
2 answers:
Yuki888 [10]3 years ago
3 0

the answer is

y≥2x/5+2

Step-by-step explanation:

we moved the y to the right site and the -10 to the left site

so we had

2x+10≤5y

and then we devided by 5

2x/5+10/5≤y

y≥2x/5+2

hopefully its correct

coldgirl [10]3 years ago
3 0

Answer:  Choice D

y \ge \frac{2}{5}x +2\\\\

=======================================

Work Shown:

2x - 5y \le -10\\\\-5y \le -2x-10\\\\y \ge \frac{-2x-10}{-5} \  \text{ ...  see note1 below}\\\\y \ge \frac{-2x}{-5} - \frac{10}{-5}\\\\y \ge \frac{2}{5}x +2 \  \text{ ...  answer is choice D}\\\\

Note1: when dividing both sides by a negative number, the inequality sign flips.

----------------

Here's another approach that doesn't involve dividing both sides by a negative number.

2x - 5y \le -10\\\\2x \le -10+5y\\\\2x +10\le 5y\\\\5y \ge 2x+10 \ \text{ .... see note2 below}\\\\y \ge \frac{2x+10}{5}\\\\y \ge \frac{2x}{5} + \frac{10}{5}\\\\y \ge \frac{2}{5}x +2\\\\

Note2: I swapped the left and right sides. Doing this swap means that the inequality sign must flip as well.

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