Answer:
4
Step-by-step explanation:
Well i learned this awhile ago... Its a prism!
Answer:
90°
Step-by-step explanation:
All angles inside a triangle add up to 180 so:
180 - 10 - 80 = 90
Therefore, the 3rd angle is 90°
Answer:
(x+6)(x+2)=60
expand
x^2+6x+2x+12=60
x^2+8x+12=60
minus 60 both sides
x^2+8x-48=0
factor
what multiplies to -48 and adds to 8
-4 and 12
(x-4)(x+12)=0
set each to zero
x-4=0
x=4
x+12=0
x=-12
x=4 or -12
Step-by-step explanation: