Which operation should you perform first when you simplify 175- (8+45 divided by 3) x 7

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

If x = -2, then x 2-7x+10 equals a. 0 b.20 c.28

It is given that the quadratic equation hx²-3x+k=0, where h and k are constants, has roots [tex] \beta \: and \: 2 \beta [/tex]express h in terms of k