| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.24 |
| Score | 0% | 65% |
Simplify (3a)(4ab) + (7a2)(2b).
| -2ab2 | |
| 63a2b | |
| 26a2b | |
| 2a2b |
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.
(3a)(4ab) + (7a2)(2b)
(3 x 4)(a x a x b) + (7 x 2)(a2 x b)
(12)(a1+1 x b) + (14)(a2b)
12a2b + 14a2b
26a2b
A coordinate grid is composed of which of the following?
y-axis |
|
origin |
|
all of these |
|
x-axis |
The coordinate grid is composed of a horizontal x-axis and a vertical y-axis. The center of the grid, where the x-axis and y-axis meet, is called the origin.
What is the circumference of a circle with a diameter of 12?
| 18π | |
| 3π | |
| 12π | |
| 32π |
The formula for circumference is circle diameter x π:
c = πd
c = 12π
A(n) __________ is to a parallelogram as a square is to a rectangle.
triangle |
|
trapezoid |
|
quadrilateral |
|
rhombus |
A rhombus is a parallelogram with four equal-length sides. A square is a rectangle with four equal-length sides.
For this diagram, the Pythagorean theorem states that b2 = ?
a2 - c2 |
|
c2 - a2 |
|
c - a |
|
c2 + a2 |
The Pythagorean theorem defines the relationship between the side lengths of a right triangle. The length of the hypotenuse squared (c2) is equal to the sum of the two perpendicular sides squared (a2 + b2): c2 = a2 + b2 or, solved for c, \(c = \sqrt{a + b}\)