If a 40 foot tree casts a 12 fr shadow, find the length of the shadow cast by a 28-foot tree

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

Factor the expression using the gcf. the expression 21m−49n factored using the gcf