3) Calcule
diferença entre as frações:
a) 1/3 -4/5
b) 20/9-30/5
C) 2/3 - 3/5-5/7​

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2

Simplify. 3(4+4x) (type your answer in with no spaces)

Use the linear combination method to solve the system of equations. explain each step of your solution. if steps are not explained, you will not receive credit for that step. 2 + 9 = −26 −3 − 7 = 13