Area of triangle=1/2(base×height)
360=1/2((4x-2)(7x+5))
720=(4x-2)(7x+5)
FOIL the binomial
720=28x^2+6x-10
Bring 720 to the other side
28x^2+6x-10-720=0
28x^2+6x-730=0
Factor 2 out
2(14x^2+3x-365)=0
Factor 2(14x+73)(x-5)=0
x-5=0
x=5
It can't be 14x-73=0 because the length can't be negative.
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Answer:
Yes
Step-by-step explanation:
I think it looks right I hate when teacher give you work but no telling you how to do it
Answer:
how many seconds per hour?
Step-by-step explanation:
The answer is 40
you just times 23 by the number of photocopies you need with is 20
so 23x20 which is 460
500-460 is 40
Answer:
Combine the like terms
Step-by-step explanation:
2 + 7 = 2x + 5 - 43
The first step is to combine the like terms
9 = 2x - 38