Solve by factoring: x^3+7x^2-x-7=0

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

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?