In the united states, 20 out of 80 cell phones are recycled every hour. what is the percent of cellphones recycled?

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]

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?

Solve the system of equations using the linear combination method. {4x−3y=127x−3y=3 enter your answers in the boxes.