Solve using tangent formula(real answers only please no links I can’t click on them)

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

Someone answer asap for ! the following statements are true about the coins calvin and sasha have collected. * calvin and sasha has the same amount of money. * calvin has only quarters. * sasha has dimes, nickels, and pennies * calvin has the same number of quarters as sasha has dimes. * sasha has $1.95 in coins that are not dimes. exactly how many quarters does calvin have?

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]