Simplify the expression by combining like terms. Write the terms from the highest to the
lowest power of the variable.
6b2 + 3b2 + 86 - 9 + 24b2 - 14 - 5b - 4b

Extra points! find the missing dimension! need asap

Which expression gives the exact value of x?

What is the solution for the following system of equations? use any method to solve. 2x + 8y = 4 x = -3y + 5 question 4 options: x = 14, y= -3 x = 2, y = -3 x = -3, y = -3 x = 12, y = 5