Which order pair is a solution of the inequality 4x – 2y > 20?
1 answer:
Let's solve for all of the ordered pairs...
A. (2,-7)
4x-2y>20
4(2)-2(-7)>20
8+14>20
22>20
True
B. (-2,-7)
4x-2y>20
4(-2)-2(-7)>20
-8+14>20
6>20
Not true
C. (-2,7)
4x-2y>20
4(-2)-2(7)>20
-8-14>20
-22>20
Not true
D. (2,7)
4x-2y>20
4(2)-2(7)>20
8-14>20
-6>20
Not true
A is the correct answer
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X + (4x+15) = 180
5x+15=180
5x=165
x=33
4(33)+15=147. (Or you could subtract 33 from 180)
Check answer: 33+147=180 yes
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4-1=3
6-1=5
8-1=7
Step-by-step explanation:
With c= w-1 all you have to do is plug in your answers and solve for the rest. Hope it helps!
