| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.88 |
| Score | 0% | 78% |
If a = 5, b = 7, c = 6, and d = 3, what is the perimeter of this quadrilateral?
| 24 | |
| 18 | |
| 31 | |
| 21 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 5 + 7 + 6 + 3
p = 21
If b = 7 and z = -6, what is the value of -4b(b - z)?
| 18 | |
| -364 | |
| 0 | |
| -16 |
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.)
-4b(b - z)
-4(7)(7 + 6)
-4(7)(13)
(-28)(13)
-364
If a = c = 8, b = d = 9, what is the area of this rectangle?
| 42 | |
| 72 | |
| 63 | |
| 9 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 8 x 9
a = 72
Which of the following is not a part of PEMDAS, the acronym for math order of operations?
pairs |
|
division |
|
exponents |
|
addition |
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.)
Simplify (7a)(4ab) + (9a2)(5b).
| 154ab2 | |
| -17ab2 | |
| 73a2b | |
| 17a2b |
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.
(7a)(4ab) + (9a2)(5b)
(7 x 4)(a x a x b) + (9 x 5)(a2 x b)
(28)(a1+1 x b) + (45)(a2b)
28a2b + 45a2b
73a2b