_____11. If Mark bought (x – 3) toy robots which costs ( x + 5) pesos each, how much will he pay for it?
a. x2 + 2x – 15
b. x2 + 2x + 15
c. x 2 + 8x - 15
d. x2 + 8x + 15
_____12. Find the volume of a rectangular prism whose length, width and height are (x + 2) meter, (x – 2)
meter, and (x) meter. Hint: Volume of a rectangular prism = L x W x H
a. x 3 + 4x
b. x3 – 4x2- 4
c. x3 – 4x
d. x3 + 4x + 4
_____13. What is the area of a square whose side measures (a + 6) cm? Hint: Area of a square = s2
a. a2 + 12a – 36
b. a2 + 12a + 36
c. a2- 12a + 36
d. a2- 12a - 36
_____14. Which of the following equations is in simplified form?
a.85= −3
b. 85= 3
c.85 = 8
d. 85= −8
_____15. Which of the following equations is in simplified form?
a.85 = −3
b. 85 = 3
c.85 = 8
d. 85 =