Which statement shows the associative property of addition? (d + 4) + 17 = 17 + (d + 4) 7⋅(4⋅x)=(7⋅4)⋅x 13 + 5a = 5a + 13 (18 + 6) + y = 18 + (6 + y)

What number should be added to both sides of the equation to complete this square? x^2-10x=7

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]

The perimeter of a rectangular lot of land is 436 ft. this includes an easement of x feet of uniform width inside the lot on which no building can be done. if the buildable area is 122 ft by 60 ft, determine the width of the easement. select one: a. 9 feet b. 18 feet c. 4.5 feet d. 7 feet