The answer was not a. substitution. i find that with questions like this, pictures of the question is easier.

In the coordinate plan (-6,9) b (3,9) c (3,3) def is shown in the coordinate plan below

The functions below show the amount of money bella and sweet t had saved after earning money for doing chores. which description best compares the two functions?

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