| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.74 |
| Score | 0% | 75% |
Simplify 8a x 6b.
| 14ab | |
| 48\( \frac{b}{a} \) | |
| 48ab | |
| 48a2b2 |
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 x 6b = (8 x 6) (a x b) = 48ab
What is the area of a circle with a radius of 5?
| 3π | |
| 25π | |
| 81π | |
| 9π |
The formula for area is πr2:
a = πr2
a = π(52)
a = 25π
To multiply binomials, use the FOIL method. Which of the following is not a part of the FOIL method?
Inside |
|
First |
|
Odd |
|
Last |
To multiply binomials, use the FOIL method. FOIL stands for First, Outside, Inside, Last and refers to the position of each term in the parentheses.
A cylinder with a radius (r) and a height (h) has a surface area of:
π r2h |
|
π r2h2 |
|
2(π r2) + 2π rh |
|
4π r2 |
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.
If side x = 8cm, side y = 5cm, and side z = 7cm what is the perimeter of this triangle?
| 33cm | |
| 20cm | |
| 35cm | |
| 40cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 8cm + 5cm + 7cm = 20cm