an Mp3 player costs $70 and song downloads cost $0.85 each. write an expression that represents the cost of the Mp3 player and x number of download songs. then find the total cost if 20 songs are downloaded.

The surface of a spherical conductor of radius a is kept at a temperature of u (φ) = 300K+50K cos (φ). The temperature inside is governed by the Laplace equation. Find an expression for the temperature everywhere inside the sphere.

Show answers (8-5) (5-3) ^2

Which represents a quadratic functionWhich represents a quadratic function? f (x) = 2x3 + 2x2 - 4 f (x) = - 7x2 - x + 2 f (x) = - 3x + 2 f (x) = 0x2 + 3x - 3

My question is 4% of what is 56?

Solve the inequality 2 (4x - 3) > = - 3 (3x) + 5x? A.) x > = 0.5 B.) x > = 2 C.) ( - infty, 0.5) D.) ( - infty, 2]

Factor this trinomial. х^2 - 9 х + 20 А. (х - 4) (х + 5) В. (х-2) (х + 10) С. (х-2) (х - 10) D. (x-4) (х - 5)

Find the geometric mean of 7 and 12. Brainliest if you can get me the anser step by step!

If the function f (y) models the number of inches a tree grows in a (y) year, which describes an appropriate domain for the function?

What is 66% of 75? O O O C. 40 O D. 49.5 O E. 66

56.7 x41 how to work out without calculator