Answer:
Step-by-step explanation:
The formula for cos θ is a/r. A is the first number (10) and b is the second number (6). R is the hypoteneuse which can be found through r = 
.
In the equation you'd write that as r = 
which can be simplified to 
.
You end up with 
and you simplify this by doing 
, ending with the result of 
.
(I also got this answer right on the test.)
Answer:
Parallel
Step-by-step explanation:
Because it is
Answer:
f(x) = 2x² + 4x - 16
= 2(x² + 2x) - 16
= 2(x² + 2(x)(1) + 1² - 1²) - 16
= 2(x + 1)² - 2 - 16
= 2(x + 1)² - 18
Vertex: (-1, -18) minimum
Second point can be the y-intercept:
(0, -16)
It should be a concave up
Y= 25
2+y-8=19
-6+y=19
y=19+6
y=25
H=9.3
h+2.9=12.2
2.9-2.9=0
12.2-2.9=9.3
I hope that helped
