The angle between two vectors beginning at the same vertex of a triangle are 〈-1,8〉 and 〈5,-2〉.

Uanita borrowed $600 to purchase a new computer. she was charged 7% interest for two years. she used the simple interest formula to find the interest. i = 600(7)(2) what error did juanita make and how will her error affect the interest she calculates? explain.

What is the smallest integer n such that n\sqrt{2} is greater than 20

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1