Which expression is equivalent to x+2+[4x-x^2+6+8/x+4]?

a. 4x
b. 4x-4
c. x^2+7x+10
d. -x^2-5x-6

Every rhombus is a square. true false

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]