Represent the following sentence as an algebraic expression, where "a number" is the letter x. You do not need to simplify. \text{Twice the sum of a number and 7.}
Twice the sum of a number and 7.

Multiply. write your answer in simplest form. 3/8 x 5/7

Ageologist had two rocks on a scale that weighed 4.6 kilograms together. rock a was 0.5 of the total weight. how much did rock a weigh?

Aprojectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = -16t2 + 704t. after how many seconds does the projectile take to reach its maximum height?