Answer:
Step-by-step explanation:
![\frac{2}{3}[(15-6)-8(8+1)]=\frac{2}{3}[9-8*9]\\\\=\frac{2}{3}[9-72]\\\\=\frac{2}{3}*(-63)\\\\=2*(-21)\\= -42](https://tex.z-dn.net/?f=%5Cfrac%7B2%7D%7B3%7D%5B%2815-6%29-8%288%2B1%29%5D%3D%5Cfrac%7B2%7D%7B3%7D%5B9-8%2A9%5D%5C%5C%5C%5C%3D%5Cfrac%7B2%7D%7B3%7D%5B9-72%5D%5C%5C%5C%5C%3D%5Cfrac%7B2%7D%7B3%7D%2A%28-63%29%5C%5C%5C%5C%3D2%2A%28-21%29%5C%5C%3D%20-42)
<span> x^2 +(x-4)^2 =20^2</span>
<span> x^2 +(x-4)^2 =400</span>
x^2 +(x-4)^2 -400=0
factor:
2x^2-8x-384=0
Factor the 2 out of 2X^2
2(x-16) (x+12) =0
<span> Divide both sides by 2</span>
(x-16) (x+12) =0
X=16 , x=-12
<span> Number cannot be negative so x=16</span>
Answer:
x = 1/21
Step-by-step explanation:
7 = 3/9x
Multiply both sides by 9x
7 x 9x = 3/9x x 9x
9x cancels out on the right side
63x = 3
Divide both sides by 63 to isolate x
63x/63 = 3/63
x = 1/21
Answer:
possblie awnser is 1:Possible answer for Triangle 1: m∠A = 70°; m∠B = ∠55°; m∠C = 55°.
The compass marks equal lengths on both sides of ∠A; therefore, AB
Step-by-step explanation:
