Answer:
x = 90 degrees, right triangle
Step-by-step explanation:
48 + 42 + x = 180
90 + x = 180
180 - 90 = x
x = 90 degrees
Answer:
9x^2 -4
Step-by-step explanation:
(3x+2) (3x-2)
FOIL
first: 3x*3x = 9x^2
outer: 3x*-2 = -6x
inner: 3x*2 = 6x
last: -2*2 = -4
Add together
9x^2 -6x+6x -4
9x^2 -4
H = -0.25 I think don't really know, okay?