Kira needs 3,000 milligrams of zinc for a science experiment. which expression can be used to determine how many grams of zinc she needs? a. 1000 ÷ 3000 b. 1000 × 3000 c. 3000 ÷ 1000 d. 3000 × 100

What number should be added to both sides of the equation to complete this square? x^2-10x=7

Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. she also earns a base salary of $750 per week. what were her sales last week if her total earnings for the week were $1,076.25?

Big boi and travis scott are performing at the super bowl. travis scott is 62 years younger than twice big boi’s age. the sum of their ages is 70 years old. use b to represent big boi’s age. write and solve an equation.