Step 1. Simplify
7x^2 - 8x - 4 - 2x^2 + 3x + 5 + 5x^2 - 10x - 8
Step 2. Collect like terms
(7x^2 - 2x^2 + 5x^2) + (-8x + 3x - 10x) + (-4 + 5 - 8)
Step 3. Simplify
10x^2 - 15x - 7
Answer:
112.98 square units
Step-by-step explanation:
Let's work backwards:
Circumference = 2πr
(37.68)/2π = r
Area = π
Area = π * 
Area = 112.983 square units
Volume = 4/3×pi×r^3
= 4/3×3.14×12^3
= 7234.56
~ 7235
Answer:
55°
Step-by-step explanation:
Since ΔABC is right we can use the tangent ratio to find ∠B
tanB =
=
, hence
B =
(
) = 55°
Answer:
18
Step-by-step explanation:
just replace the x and y with the given values like so (3)4+0.5(4)3=x and solve for the new x value