| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.65 |
| Score | 0% | 73% |
If c = -5 and y = -8, what is the value of -5c(c - y)?
| 54 | |
| 325 | |
| -336 | |
| 75 |
To solve this equation, 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.)
-5c(c - y)
-5(-5)(-5 + 8)
-5(-5)(3)
(25)(3)
75
If a = c = 6, b = d = 5, what is the area of this rectangle?
| 10 | |
| 36 | |
| 49 | |
| 30 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 6 x 5
a = 30
If a = 4, b = 3, c = 8, and d = 7, what is the perimeter of this quadrilateral?
| 20 | |
| 19 | |
| 15 | |
| 22 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 4 + 3 + 8 + 7
p = 22
Simplify (3a)(3ab) + (7a2)(6b).
| -33ab2 | |
| 78a2b | |
| 51a2b | |
| 51ab2 |
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.
(3a)(3ab) + (7a2)(6b)
(3 x 3)(a x a x b) + (7 x 6)(a2 x b)
(9)(a1+1 x b) + (42)(a2b)
9a2b + 42a2b
51a2b
The formula for volume of a cube in terms of height (h), length (l), and width (w) is which of the following?
2lw x 2wh + 2lh |
|
lw x wh + lh |
|
h2 x l2 x w2 |
|
h x l x w |
A cube is a rectangular solid box with a height (h), length (l), and width (w). The volume is h x l x w and the surface area is 2lw x 2wh + 2lh.