Solve thank you I will give brainlist to first

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x

Kevin's bank offered him a 4.5% interest rate for his mortgage. if he purchases 3 points, what will be his new rate?

Determine the required value of the missing probability to make the distribution a discrete probability distribution. x p(x) 3 0.23 4 ? 5 0.51 6 0.08 p(4) = nothing  (type an integer or a decimal.)