| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.84 |
| Score | 0% | 77% |
Which of the following is not a part of PEMDAS, the acronym for math order of operations?
division |
|
addition |
|
exponents |
|
pairs |
When solving an equation with two variables, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
What is the area of a circle with a radius of 3?
| 16π | |
| 2π | |
| 9π | |
| 64π |
The formula for area is πr2:
a = πr2
a = π(32)
a = 9π
The formula for the area of a circle is which of the following?
a = π d2 |
|
a = π r2 |
|
a = π r |
|
a = π d |
The circumference of a circle is the distance around its perimeter and equals π (approx. 3.14159) x diameter: c = π d. The area of a circle is π x (radius)2 : a = π r2.
Simplify (5a)(8ab) - (3a2)(2b).
| 34a2b | |
| -34ab2 | |
| 65ab2 | |
| 46a2b |
To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.
(5a)(8ab) - (3a2)(2b)
(5 x 8)(a x a x b) - (3 x 2)(a2 x b)
(40)(a1+1 x b) - (6)(a2b)
40a2b - 6a2b
34a2b
The dimensions of this cube are height (h) = 2, length (l) = 4, and width (w) = 4. What is the volume?
| 160 | |
| 20 | |
| 32 | |
| 168 |
The volume of a cube is height x length x width:
v = h x l x w
v = 2 x 4 x 4
v = 32