Solve the system of equations using the substitution method. 3x + 5y = 23 y = 4x

Asphere has a diameter of 10 in. what is the volume of the sphere?

Factor x2 – 8x + 15. which pair of numbers has a product of ac and a sum of what is the factored form of the

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?