(picture) multiplying monomials and binomials

How many $20 bills do you need to have to make $280

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?

When is g(x) = 0 for the function g(x) = 5.23x + 4?