Solve the system of equations by graphing, elimination or substitution method. Follow one method please.
(3 Points)
y = 2x + 2
y = -x - 4
One Solution (-1, -2)
One Solution (-2, -2)
No Solution

What is the value of f(x) = 2.2 for f(-2)?

Simplify using positive exponents only.

Suppose a laboratory has a 30 g sample of polonium-210. the half-life of polonium-210 is about 138 days how many half-lives of polonium-210 occur in 1104 days? how much polonium is in the sample 1104 days later? 9; 0.06 g 8; 0.12 g 8; 2,070 g