| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.50 |
| Score | 0% | 70% |
Simplify (7a)(8ab) + (6a2)(6b).
| 92ab2 | |
| 92a2b | |
| -20a2b | |
| 180a2b |
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)(8ab) + (6a2)(6b)
(7 x 8)(a x a x b) + (6 x 6)(a2 x b)
(56)(a1+1 x b) + (36)(a2b)
56a2b + 36a2b
92a2b
Simplify 8a x 7b.
| 56\( \frac{a}{b} \) | |
| 15ab | |
| 56ab | |
| 56a2b2 |
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.
8a x 7b = (8 x 7) (a x b) = 56ab
What is 4a4 + 5a4?
| 9a8 | |
| a48 | |
| 9 | |
| 9a4 |
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.
4a4 + 5a4 = 9a4
If the base of this triangle is 8 and the height is 8, what is the area?
| 32 | |
| 49 | |
| 36 | |
| 71\(\frac{1}{2}\) |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 8 x 8 = \( \frac{64}{2} \) = 32
If a = c = 2, b = d = 4, and the blue angle = 56°, what is the area of this parallelogram?
| 8 | |
| 49 | |
| 45 | |
| 7 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 2 x 4
a = 8