arrange the digits 1,2,3,4,5,6,7,8, and 9 into three groups. Make one group of two digits, one group of three digits, and one group of four digits. When you multiply the first group of two digits by the second group of three digits you get the four digit number as your answer. You can only use each number once.

Find the solution of this system of equation -7x+y=-20 9x-3y=36

If f(x) = 4 - x2 and g(x) = 6x, which expression is equivalent to (g-f)(3)? 06-3-(4 + 3)2 06-3-(4-33 6(3) - 4 +32 6(3) -4 -32

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?