I'm bad at math helpppppp
1 answer:
Answer:
2x + y = 18
y = 4x - 12
x = 5, y = 8
Step-by-step explanation:
x = 1st number
y = 2nd number
We can use the substitution method as we know what 'y' equals; that value will get plugged in for 'y' in the first equation as follows:
2x + 4x - 12 = 18
6x - 12 = 18
6x = 30
x = 5
y = 4(5) - 12 which is 20-12 or 8
y = 8
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Perimeter of a rectangle,
Pr = 2L+ 2W
L = (W + 14)
Pr = 2(W+14) + 2W
Pr= 2W + 28 +2W
Pr =96 = 4W + 28
Pr = (96 — 28) = 4W
Pr = 68 = 4W
W = 68/4 = 17m, L= 17+14 = 31m
Check:
17m+17m+31m+31m= 96m