ASVAB Math Knowledge Practice Test 862909 Results

Your Results Global Average
Questions 5 5
Correct 0 2.98
Score 0% 60%

Review

1

The endpoints of this line segment are at (-2, -1) and (2, -3). What is the slope-intercept equation for this line?

41% Answer Correctly
y = -\(\frac{1}{2}\)x + 2
y = -2x + 2
y = 3x - 2
y = -\(\frac{1}{2}\)x - 2

Solution

The slope-intercept equation for a line is y = mx + b where m is the slope and b is the y-intercept of the line. From the graph, you can see that the y-intercept (the y-value from the point where the line crosses the y-axis) is -2. The slope of this line is the change in y divided by the change in x. The endpoints of this line segment are at (-2, -1) and (2, -3) so the slope becomes:

m = \( \frac{\Delta y}{\Delta x} \) = \( \frac{(-3.0) - (-1.0)}{(2) - (-2)} \) = \( \frac{-2}{4} \)
m = -\(\frac{1}{2}\)

Plugging these values into the slope-intercept equation:

y = -\(\frac{1}{2}\)x - 2


2

What is 8a - 7a?

80% Answer Correctly
a2
56a2
56a
1a

Solution

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 - 7a = 1a


3

Solve for b:
b2 - 3b - 10 = 0

58% Answer Correctly
-8 or -9
-2 or 5
1 or -1
7 or -9

Solution

The first step to solve a quadratic equation that's set to zero is to factor the quadratic equation:

b2 - 3b - 10 = 0
(b + 2)(b - 5) = 0

For this expression to be true, the left side of the expression must equal zero. Therefore, either (b + 2) or (b - 5) must equal zero:

If (b + 2) = 0, b must equal -2
If (b - 5) = 0, b must equal 5

So the solution is that b = -2 or 5


4

On this circle, line segment AB is the:

71% Answer Correctly

radius

circumference

chord

diameter


Solution

A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).


5

For this diagram, the Pythagorean theorem states that b2 = ?

47% Answer Correctly

c2 + a2

c - a

c2 - a2

a2 - c2


Solution

The Pythagorean theorem defines the relationship between the side lengths of a right triangle. The length of the hypotenuse squared (c2) is equal to the sum of the two perpendicular sides squared (a2 + b2): c2 = a2 + b2 or, solved for c, \(c = \sqrt{a + b}\)