Solve the equation 3.4k+(0.63-0.81K)/0.9=5.7

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.

Ihave a triangle with a 60 degree angle. lets use d for that angle. what are the values of e and f if d is 60 degrees? and what do you notice about the values of e and f?

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b