ASAP
Solve.

{m+n=5
(m−n=3

Use the substitution method.

There are an infinite number of solutions.

The solution is (4, 1).

There is no solution.

The solution is (2, −1).

Arectangular prism is 3 meters long, 6 meters wide, and has a height of 9 meters. what is its surface area?

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

The weight of a radioactive isotope was 96 grams at the start of an experiment. after one hour, the weight of the isotope was half of its initial weight. after two hours, the weight of the isotope was half of its weight the previous hour. if this pattern continues, which of the following graphs represents the weight of the radioactive isotope over time? a. graph w b. graph x c. graph y d. graph z