Answer:
x - 11 = 15
Step-by-step explanation:
x is rpthe unknown number
Answer:
x=-6,x=3
Step-by-step explanation:
x^2-x-18=-4x
Adding both sides by 4x
x^2+3x-18=0
Factoring
(x+6)(x-3)=0
x=-6,x=3
Answer:13
Step-by-step explanation:
I assume you want to find x?
Anyways, by pythagoras, the slide length of the side that shares both triangles is sqrt(17^2 -13^2) = 2sqrt30. By Pythagoras again, x =sqrt(7^2 + (2sqrt30)^2), or 13.
Answer:
D
Step-by-step explanation:
f(x) = x-4
f(3.2) = -3.2-4
= -7.2