can anyone help me in math, for free? i'm in 8th grade. it's mostly scientific notation, modules, pythagorean theorem, and functions. you have to have some type of social media! (ig, snap, dc, ect)

Simplify the expression. -2/5(10+15m-20n)

According to the 2008 u. s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of florida was approximately two times the population of california. b. the population of florida was approximately twenty times the population of california. c. the population of california was approximately twenty times the population of florida. d. the population of california was approximately two times the population of florida.

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a. p.