| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.47 |
| Score | 0% | 69% |
Solve for y:
-8y + 2 = 7 - 9y
| \(\frac{2}{3}\) | |
| -\(\frac{2}{3}\) | |
| 5 | |
| 1\(\frac{1}{6}\) |
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 equal sign and the answer on the other.
-8y + 2 = 7 - 9y
-8y = 7 - 9y - 2
-8y + 9y = 7 - 2
y = 5
If a = c = 4, b = d = 5, and the blue angle = 50°, what is the area of this parallelogram?
| 18 | |
| 9 | |
| 40 | |
| 20 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 4 x 5
a = 20
If a = c = 5, b = d = 3, what is the area of this rectangle?
| 18 | |
| 32 | |
| 15 | |
| 72 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 5 x 3
a = 15
What is 2a7 + 5a7?
| a714 | |
| 7a7 | |
| 10a14 | |
| -3 |
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.
2a7 + 5a7 = 7a7
If a = 9 and z = -4, what is the value of 7a(a - z)?
| 0 | |
| 819 | |
| 280 | |
| -24 |
To solve this equation, 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.)
7a(a - z)
7(9)(9 + 4)
7(9)(13)
(63)(13)
819