| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.87 |
| Score | 0% | 57% |
Solve for x:
4x - 8 < -9 - 3x
| x < -\(\frac{1}{7}\) | |
| x < -\(\frac{3}{8}\) | |
| x < \(\frac{2}{3}\) | |
| x < -1\(\frac{1}{4}\) |
To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the < sign and the answer on the other.
4x - 8 < -9 - 3x
4x < -9 - 3x + 8
4x + 3x < -9 + 8
7x < -1
x < \( \frac{-1}{7} \)
x < -\(\frac{1}{7}\)
If the base of this triangle is 4 and the height is 9, what is the area?
| 52\(\frac{1}{2}\) | |
| 18 | |
| 84 | |
| 27\(\frac{1}{2}\) |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 4 x 9 = \( \frac{36}{2} \) = 18
The formula for the area of a circle is which of the following?
c = π d |
|
c = π r |
|
c = π r2 |
|
c = π d2 |
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 (7a)(9ab) + (4a2)(7b).
| 91ab2 | |
| 35a2b | |
| 91a2b | |
| -35a2b |
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)(9ab) + (4a2)(7b)
(7 x 9)(a x a x b) + (4 x 7)(a2 x b)
(63)(a1+1 x b) + (28)(a2b)
63a2b + 28a2b
91a2b
To multiply binomials, use the FOIL method. Which of the following is not a part of the FOIL method?
Odd |
|
Last |
|
First |
|
Inside |
To multiply binomials, use the FOIL method. FOIL stands for First, Outside, Inside, Last and refers to the position of each term in the parentheses.