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.
You're welcome.
The answer would be 0.25... when multiplying by 10, shift the decimal place one to the right.
Answer:
Midpoint of a line segment with the endpoints A(a1, a2), B(b1, b2) is M(1/2*(a1 + b1), 1/2*(a2 + b2))
So,
(1/2*(-4 + 7), 1/2*(-3 + (-5))) = (1/2*3, 1/2*(-8)) = (1.5, -4)
Answer D is correct.
Answer:
n=-1, 1
Step-by-step explanation:
-4|8n|=-32
Divide each side by -4
-4|8n|/-4=-32/-4
|8n|=8
When we have absolute values, we need to make two equations, one positive and one negative
8n=8 8n=-8
Divide each side by 8
8n/8 = 8/8 8n/8 = -8/8
n=1 n=-1