| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.45 |
| Score | 0% | 69% |
Simplify (8a)(5ab) - (9a2)(5b).
| 5ab2 | |
| 182ab2 | |
| -5a2b | |
| 182a2b |
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.
(8a)(5ab) - (9a2)(5b)
(8 x 5)(a x a x b) - (9 x 5)(a2 x b)
(40)(a1+1 x b) - (45)(a2b)
40a2b - 45a2b
-5a2b
Which types of triangles will always have at least two sides of equal length?
equilateral, isosceles and right |
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equilateral and right |
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isosceles and right |
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equilateral and isosceles |
An isosceles triangle has two sides of equal length. An equilateral triangle has three sides of equal length. In a right triangle, two sides meet at a right angle.
The dimensions of this cylinder are height (h) = 3 and radius (r) = 4. What is the volume?
| 48π | |
| 729π | |
| 256π | |
| 18π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(42 x 3)
v = 48π
The formula for the area of a circle is which of the following?
a = π r |
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a = π d |
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a = π r2 |
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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 is not a part of PEMDAS, the acronym for math order of operations?
exponents |
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addition |
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division |
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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.)