| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.47 |
| Score | 0% | 69% |
Simplify 4a x 7b.
| 11ab | |
| 28ab | |
| 28a2b2 | |
| 28\( \frac{b}{a} \) |
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.
4a x 7b = (4 x 7) (a x b) = 28ab
Which of the following is not a part of PEMDAS, the acronym for math order of operations?
exponents |
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division |
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pairs |
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addition |
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.)
The dimensions of this trapezoid are a = 4, b = 7, c = 5, d = 4, and h = 2. What is the area?
| 20 | |
| 11 | |
| 24 | |
| 16 |
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(7 + 4)(2)
a = ½(11)(2)
a = ½(22) = \( \frac{22}{2} \)
a = 11
What is the circumference of a circle with a radius of 13?
| 38π | |
| 26π | |
| 4π | |
| 3π |
The formula for circumference is circle diameter x π. Circle diameter is 2 x radius:
c = πd
c = π(2 * r)
c = π(2 * 13)
c = 26π
A(n) __________ is to a parallelogram as a square is to a rectangle.
trapezoid |
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quadrilateral |
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rhombus |
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triangle |
A rhombus is a parallelogram with four equal-length sides. A square is a rectangle with four equal-length sides.