Prove that a is a subset of b if and only if b complement is a subset of a complement.

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years

Given the quadratic function f(x)=3x^2-24x+49 a. use “completing the squares” to convert the quadratic function into vertex form b. state the vertex c. find the x and y intercepts d. graph the function