does anyone know how to do algebra?? i’m in 8th grade applying for a magnet school for high school and i’m just so confused.

Arectangle has a width of 5 cm and a length of 10 cm. if the width is increased by 3, how does the perimeter change?

The function f(x) is shown in this graph the function g(x)=6x

Aclothing designer is selecting models to walk the runway for her fashion show. the clothes she designed require each model’s height to be no more than y inches from 5 feet 10 inches, or 70 inches. which graph could be used to determine the possible variance levels that would result in an acceptable height, x?