| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.20 |
| Score | 0% | 64% |
What is 5a8 + 8a8?
| 13a16 | |
| -3a16 | |
| 13a8 | |
| a816 |
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.
5a8 + 8a8 = 13a8
The formula for the area of a circle is which of the following?
a = π d |
|
a = π r2 |
|
a = π r |
|
a = 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.
Which of the following statements about a parallelogram is not true?
opposite sides and adjacent angles are equal |
|
the area of a parallelogram is base x height |
|
the perimeter of a parallelogram is the sum of the lengths of all sides |
|
a parallelogram is a quadrilateral |
A parallelogram is a quadrilateral with two sets of parallel sides. Opposite sides (a = c, b = d) and angles (red = red, blue = blue) are equal. The area of a parallelogram is base x height and the perimeter is the sum of the lengths of all sides (a + b + c + d).
Solve 4b - 4b = -5b + 6x - 7 for b in terms of x.
| -\(\frac{2}{3}\)x + \(\frac{8}{15}\) | |
| x - 1\(\frac{1}{3}\) | |
| 1\(\frac{1}{9}\)x - \(\frac{7}{9}\) | |
| 1\(\frac{3}{8}\)x - 1\(\frac{1}{8}\) |
To solve this equation, isolate the variable for which you are solving (b) on one side of the equation and put everything else on the other side.
4b - 4x = -5b + 6x - 7
4b = -5b + 6x - 7 + 4x
4b + 5b = 6x - 7 + 4x
9b = 10x - 7
b = \( \frac{10x - 7}{9} \)
b = \( \frac{10x}{9} \) + \( \frac{-7}{9} \)
b = 1\(\frac{1}{9}\)x - \(\frac{7}{9}\)
Which of the following expressions contains exactly two terms?
polynomial |
|
monomial |
|
binomial |
|
quadratic |
A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.