| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.50 |
| Score | 0% | 70% |
Order the following types of angle from least number of degrees to most number of degrees.
right, acute, obtuse |
|
acute, right, obtuse |
|
right, obtuse, acute |
|
acute, obtuse, right |
An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.
The dimensions of this trapezoid are a = 6, b = 6, c = 9, d = 9, and h = 4. What is the area?
| 18 | |
| 10 | |
| 30 | |
| 20 |
The area of a trapezoid is one-half the sum of the lengths of the parallel sides multiplied by the height:
a = ½(b + d)(h)
a = ½(6 + 9)(4)
a = ½(15)(4)
a = ½(60) = \( \frac{60}{2} \)
a = 30
Which of the following is not a part of PEMDAS, the acronym for math order of operations?
exponents |
|
addition |
|
division |
|
pairs |
When solving an equation with two variables, 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.)
Simplify (2a)(3ab) - (6a2)(7b).
| 36ab2 | |
| -36a2b | |
| 48ab2 | |
| 65ab2 |
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)(3ab) - (6a2)(7b)
(2 x 3)(a x a x b) - (6 x 7)(a2 x b)
(6)(a1+1 x b) - (42)(a2b)
6a2b - 42a2b
-36a2b
A(n) __________ is two expressions separated by an equal sign.
problem |
|
formula |
|
expression |
|
equation |
An equation is two expressions separated by an equal sign. The key to solving equations is to repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the equal sign and the answer on the other.