| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.11 |
| Score | 0% | 62% |
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 15% off." If Bob buys two shirts, each with a regular price of $44, how much will he pay for both shirts?
| $6.60 | |
| $48.40 | |
| $81.40 | |
| $37.40 |
By buying two shirts, Bob will save $44 x \( \frac{15}{100} \) = \( \frac{$44 x 15}{100} \) = \( \frac{$660}{100} \) = $6.60 on the second shirt.
So, his total cost will be
$44.00 + ($44.00 - $6.60)
$44.00 + $37.40
$81.40
A circular logo is enlarged to fit the lid of a jar. The new diameter is 40% larger than the original. By what percentage has the area of the logo increased?
| 32\(\frac{1}{2}\)% | |
| 17\(\frac{1}{2}\)% | |
| 20% | |
| 35% |
The area of a circle is given by the formula A = πr2 where r is the radius of the circle. The radius of a circle is its diameter divided by two so A = π(\( \frac{d}{2} \))2. If the diameter of the logo increases by 40% the radius (and, consequently, the total area) increases by \( \frac{40\text{%}}{2} \) = 20%
Which of the following is not an integer?
\({1 \over 2}\) |
|
1 |
|
0 |
|
-1 |
An integer is any whole number, including zero. An integer can be either positive or negative. Examples include -77, -1, 0, 55, 119.
Solve 3 + (4 + 5) ÷ 5 x 4 - 32
| 4\(\frac{1}{2}\) | |
| 1\(\frac{1}{5}\) | |
| 1\(\frac{3}{5}\) | |
| \(\frac{1}{4}\) |
Use PEMDAS (Parentheses, Exponents, Multipy/Divide, Add/Subtract):
3 + (4 + 5) ÷ 5 x 4 - 32
P: 3 + (9) ÷ 5 x 4 - 32
E: 3 + 9 ÷ 5 x 4 - 9
MD: 3 + \( \frac{9}{5} \) x 4 - 9
MD: 3 + \( \frac{36}{5} \) - 9
AS: \( \frac{15}{5} \) + \( \frac{36}{5} \) - 9
AS: \( \frac{51}{5} \) - 9
AS: \( \frac{51 - 45}{5} \)
\( \frac{6}{5} \)
1\(\frac{1}{5}\)
What is -3z4 - 5z4?
| 2z4 | |
| 2z-8 | |
| -8z4 | |
| 8z-4 |
To add or subtract terms with exponents, both the base and the exponent must be the same. In this case they are so subtract the coefficients and retain the base and exponent:
-3z4 - 5z4
(-3 - 5)z4
-8z4