Choose the equivalent expression for 13 (15m+3b-21).

5m+3b-7

5m+b-7

45m+9b-63

5m+3b-21

What is the equation of 6x-3=39

A large balloon in the shape of a sphere is being filled with helium. The bloom has a radius of 1 foot. Helium cost is $.80 per cubic foot. What is the cost of filling the balloon with helium?

The circulation of a city library for September was 157,928 books; for October, 184,211 books. What was the percent of gain for October over September?

Describe the steps you used to solve the equation and find the amount of Carrie's allowance. Linear equation: 1 4 a + 1 3 a + 8 = 22

A travel agency offers two Dallas outings. Plan A includes hotel accommodations for three nights and two pairs of Texas Rangers baseball tickets worth a total of $557.

Solve each system using substitution. 1. 4x = 3y-2; 18 = 3x+y 2. 3x+2y = 23; 1/2x-4 = y

6. How many positive integers not exceeding 1000 are divisible by 3 or 5 or 7?

bob has $830 in an account earning 5.3% simple interest. how much more interest would her account earn in 9 years with annually compounded interest?

For the quadratic equation x2 + 2x + 8 = 0, find the value of the discriminant. Then, describe the number and type of roots for the equation. Finally, find the exact solution of the equation by using the Quadratic Formula.

Shawn placed 18 weights on a scale during science class. If each weight weighed 0.1 grams, what did the scale read?