What is 645 rounded to the nearest ten

Select the graph of the solution. click until the correct graph appears. |x| = 3

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

Consider the triangle. which shows the order of the angles from smallest to largest? angle a, angle b, angle c angle b, angle a, angle c angle b, angle c, angle a angle c, angle a, angle b