Simplify the following.

(9x2+7x-6)+(9x2-7x+6)

Hillel is juggling flaming torches to raise money for charity. his initial appearance raises $500\$500 $500 , and he raises $15\$15 $15 for each minute of juggling performance. the amount rr r of money hillel raises is a function of tt t , the length of his performance in minutes. write the function's formula.

Which ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).