Find a word that has a value of 18

The triangles are similar. what is the value of x? enter your answer in the box. x = two right triangles. the larger right triangle is labeled x on the longer leg, 12 on the shorter leg and 20 on the hypotenuse. the smaller triangle is labeled 4 on the longer leg, 3 on the shorter leg, and 5 on the hypotenuse.

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

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