| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.19 |
| Score | 0% | 64% |
Solve 4 + (3 + 3) ÷ 2 x 2 - 42
| \(\frac{2}{3}\) | |
| 1\(\frac{1}{8}\) | |
| -6 | |
| \(\frac{7}{8}\) |
Use PEMDAS (Parentheses, Exponents, Multipy/Divide, Add/Subtract):
4 + (3 + 3) ÷ 2 x 2 - 42
P: 4 + (6) ÷ 2 x 2 - 42
E: 4 + 6 ÷ 2 x 2 - 16
MD: 4 + \( \frac{6}{2} \) x 2 - 16
MD: 4 + \( \frac{12}{2} \) - 16
AS: \( \frac{8}{2} \) + \( \frac{12}{2} \) - 16
AS: \( \frac{20}{2} \) - 16
AS: \( \frac{20 - 32}{2} \)
\( \frac{-12}{2} \)
-6
What is 5a7 + 3a7?
| 2a-7 | |
| 8a7 | |
| 2a7 | |
| 8a49 |
To add or subtract terms with exponents, both the base and the exponent must be the same. In this case they are so add the coefficients and retain the base and exponent:
5a7 + 3a7
(5 + 3)a7
8a7
A bread recipe calls for 2\(\frac{1}{4}\) cups of flour. If you only have \(\frac{5}{8}\) cup, how much more flour is needed?
| 2\(\frac{1}{4}\) cups | |
| 2\(\frac{3}{4}\) cups | |
| 1\(\frac{3}{8}\) cups | |
| 1\(\frac{5}{8}\) cups |
The amount of flour you need is (2\(\frac{1}{4}\) - \(\frac{5}{8}\)) cups. Rewrite the quantities so they share a common denominator and subtract:
(\( \frac{18}{8} \) - \( \frac{5}{8} \)) cups
\( \frac{13}{8} \) cups
1\(\frac{5}{8}\) cups
If a car travels 200 miles in 5 hours, what is the average speed?
| 75 mph | |
| 50 mph | |
| 40 mph | |
| 60 mph |
Average speed in miles per hour is the number of miles traveled divided by the number of hours:
speed = \( \frac{\text{distance}}{\text{time}} \)The __________ is the smallest positive integer that is a multiple of two or more integers.
least common factor |
|
absolute value |
|
greatest common factor |
|
least common multiple |
The least common multiple (LCM) is the smallest positive integer that is a multiple of two or more integers.