If for all real values of x, (x + c)(x + 4) = x2 + 8x + 4c, then c = ?

a. 2
b. 4
c. 6
d. 8
e. 10

Adam plans to choose a video game from the section of the store where everything is 75% off. he writes the expression d-0.75d to find the sale price of the game if the original price is d dollars. gena correctly writes another expression, 0.25d, that will also find the sale price of the game if the original price is d dollars. use the drop down menus to explain each part of adams and rena's expression

Which of the following parabolas opens down?

What is the circumference of a circle with an area of 50.24 cm²?