| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.53 |
| Score | 0% | 71% |
A(n) __________ is two expressions separated by an equal sign.
expression |
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formula |
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equation |
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problem |
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.
If angle a = 55° and angle b = 21° what is the length of angle c?
| 93° | |
| 90° | |
| 104° | |
| 77° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 55° - 21° = 104°
What is the area of a circle with a radius of 5?
| 9π | |
| 4π | |
| 3π | |
| 25π |
The formula for area is πr2:
a = πr2
a = π(52)
a = 25π
A cylinder with a radius (r) and a height (h) has a surface area of:
π r2h2 |
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4π r2 |
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π r2h |
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2(π r2) + 2π rh |
A cylinder is a solid figure with straight parallel sides and a circular or oval cross section with a radius (r) and a height (h). The volume of a cylinder is π r2h and the surface area is 2(π r2) + 2π rh.
Simplify 4a x 4b.
| 16\( \frac{a}{b} \) | |
| 16\( \frac{b}{a} \) | |
| 8ab | |
| 16ab |
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 4b = (4 x 4) (a x b) = 16ab