| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.85 |
| Score | 0% | 77% |
What is the area of a circle with a radius of 5?
| 2π | |
| 7π | |
| 4π | |
| 25π |
The formula for area is πr2:
a = πr2
a = π(52)
a = 25π
Solve for b:
-5b + 5 > 8 + 9b
| b > -\(\frac{3}{14}\) | |
| b > -2\(\frac{1}{2}\) | |
| b > -\(\frac{4}{5}\) | |
| b > -\(\frac{1}{3}\) |
To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the > sign and the answer on the other.
-5b + 5 > 8 + 9b
-5b > 8 + 9b - 5
-5b - 9b > 8 - 5
-14b > 3
b > \( \frac{3}{-14} \)
b > -\(\frac{3}{14}\)
If side x = 9cm, side y = 14cm, and side z = 15cm what is the perimeter of this triangle?
| 24cm | |
| 32cm | |
| 27cm | |
| 38cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 9cm + 14cm + 15cm = 38cm
Which of the following is not a part of PEMDAS, the acronym for math order of operations?
exponents |
|
division |
|
pairs |
|
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.)
What is 8a + 6a?
| 14a | |
| 48a2 | |
| 48a | |
| 14 |
To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.
8a + 6a = 14a