| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.89 |
| Score | 0% | 58% |
Solve -2a - 5a = -3a + 7y - 6 for a in terms of y.
| -1\(\frac{1}{4}\)y - \(\frac{3}{8}\) | |
| 2\(\frac{3}{7}\)y + \(\frac{5}{7}\) | |
| 12y - 6 | |
| 2y + \(\frac{3}{5}\) |
To solve this equation, isolate the variable for which you are solving (a) on one side of the equation and put everything else on the other side.
-2a - 5y = -3a + 7y - 6
-2a = -3a + 7y - 6 + 5y
-2a + 3a = 7y - 6 + 5y
a = 12y - 6
The dimensions of this cube are height (h) = 1, length (l) = 9, and width (w) = 6. What is the surface area?
| 22 | |
| 78 | |
| 100 | |
| 138 |
The surface area of a cube is (2 x length x width) + (2 x width x height) + (2 x length x height):
sa = 2lw + 2wh + 2lh
sa = (2 x 9 x 6) + (2 x 6 x 1) + (2 x 9 x 1)
sa = (108) + (12) + (18)
sa = 138
Which of the following is not a part of PEMDAS, the acronym for math order of operations?
pairs |
|
addition |
|
exponents |
|
division |
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.)
The formula for the area of a circle is which of the following?
c = π d |
|
c = π r2 |
|
c = π d2 |
|
c = π r |
The circumference of a circle is the distance around its perimeter and equals π (approx. 3.14159) x diameter: c = π d. The area of a circle is π x (radius)2 : a = π r2.
A quadrilateral is a shape with __________ sides.
4 |
|
2 |
|
5 |
|
3 |
A quadrilateral is a shape with four sides. The perimeter of a quadrilateral is the sum of the lengths of its four sides.