Evaluate 1/4x^4-1/2x^2 for x=2

Solutions for 2x+7 less than or equal to 3x-5

Ariel is working at a meat packing plant for 5 nights a week. her regular wage is $11 an hour. she earns tine and a half for any overtime hours. this week she worked 9 hours of over time .how much will ariel earn for overtime this week ?

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi