Linear functions: given X2-X1=X4-x3 Prove f(x2)-f(x1)=f(x4)-f(x3)
proof: 1. x2-x1=x4-x3
proof 2. m(x2-x1)= (x4-x3)

Secant ac and bd intersect at point e inside f what is the measure of aed if measurements cd equals 30 a b is 50 and cb is 170

In δabc, m∠acb = 90°, cd ⊥ ab and m∠acd = 45°. find: a find cd, if bc = 3 in

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?