SOLUTIONS
if the volume of a cube is 8cm^3, what is the length of the cube?
a. 1 cm
b. 2 cm
c. 3 cm
d. 4 cm
e. 8 cm - ✅✅✅CORRECT -B. 2 cm
Simplify the following expression: (2x2 + 3) (2x - 1)
a. 4x3 - 2x2 +6x - 3
b. 2x2 +6x - 3
c. 4x3 - 2x2 +6x + 3
d. 4x3 - 2x2 - 6x - 3
e. 2x2 - 6x + 3 - ✅✅✅CORRECT -A. 4x3 - 2x2 +6x - 3
Simplify the following expression:
(2x4y7m2z) * (5x2y3m8)
a. 10x6y9m10z
b. 7x6y10m10z
c. 10x5y10m10z
d. 10x6y10m10z
e. 7x5y9m10z - ✅✅✅CORRECT -D. 10x6y10m10z
, A classroom contains 13 boys and 18 girls. If a student's name is chosen randomly, what is the probability
it will be a girl's name?
a. 36%
b. 42%
c. 58%
d. 72%
e. 84% - ✅✅✅CORRECT -c. 58%
If x - 9 = 2x + 10, what is the value of x?
a. -19
b. 19
c. 6.3
d. -6.3
e. none of the above - ✅✅✅CORRECT -a. -19
A rectangle has a width of 7 cm and a length of 9 cm. What is its perimeter?
a. 16 cm
b. 32 cm
c. 48 cm
d. 62 cm
e . 63 cm - ✅✅✅CORRECT -b. 32
The perimeter of a figure is the sum of all of its sides. Since a rectangle's width and length will be the
same on opposite sides, the perimeter of a rectangle can be calculated by using the following formula:
perimeter = 2(width) + 2(length)
Using the numbers given in the question:
perimeter = 2(7cm) + 2(9cm)