Hakim is a kickboxing instructor who will be teaching classes at a local gym. To get certified as an instructor, he spent a total of $90. Hakim will be earning a base salary of $70 per month from the gym, plus an additional $5 for every class he teaches. If Hakim teaches a certain number of classes during his first month as an instructor, he will earn back the amount he spent on certification. How many classes will that take?

4 classes

Step-by-step explanation:

So to solve this problem, you can make an equation. Since he makes $70 per month and $5 per class, and you're trying to figure out how many classes he has to take to get $90, you have the equation 70 + 5x = 90.

Then, you solve:

subtract 70 from both sides

divide both sides by 5

So you get that he has to take 4 classes.

arithmetic sequence: a sequnce in which the diffrence between any two consecutive terms is the same

step-by-step explanation:

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.