| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.62 |
| Score | 0% | 72% |
A trapezoid is a quadrilateral with one set of __________ sides.
equal angle |
|
parallel |
|
equal length |
|
right angle |
A trapezoid is a quadrilateral with one set of parallel sides.
If b = 3 and z = 9, what is the value of -3b(b - z)?
| -448 | |
| 84 | |
| 54 | |
| -176 |
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.)
-3b(b - z)
-3(3)(3 - 9)
-3(3)(-6)
(-9)(-6)
54
Simplify (2a)(5ab) + (3a2)(2b).
| 16a2b | |
| 4ab2 | |
| 35a2b | |
| 4a2b |
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.
(2a)(5ab) + (3a2)(2b)
(2 x 5)(a x a x b) + (3 x 2)(a2 x b)
(10)(a1+1 x b) + (6)(a2b)
10a2b + 6a2b
16a2b
If a = c = 5, b = d = 9, what is the area of this rectangle?
| 27 | |
| 40 | |
| 45 | |
| 18 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 5 x 9
a = 45
What is 5a + 2a?
| 7a | |
| a2 | |
| 3a2 | |
| 7a2 |
To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.
5a + 2a = 7a