Noah has a total of 50 video games. He only buys action games and sports games. He has 20 more action games than sports games. How many action games and how many sports games does he have? Use substitution to solve this system of equations.

What is the value of x when x + 7 = 21?

Calculate the total payback for a $3,500 loan at 8% annual interest with monthly payments for two years. show all of your steps. use the formula, m = pm(1 + m)^na/(1 + m)^na - 1, as needed.

The seventh-grade students at charleston middle school are choosing one girl and one boy for student council. their choices for girls are michaela (m), candice (c), and raven (r), and for boys, neil (n), barney (b), and ted (t). the sample space for the combined selection is represented in the table. complete the table and the sentence beneath it.