If 60% of x equal to 30% of 20, then what is the value of (x + 5)^2?
a. 25.25
b. 26
c. 26.01
d. 2025
e. 225 - ANS e. 225
0.6x = (0.3) x 20 → x = 10
(x + 5)^2 → (10 + 5)^2 = (15)^2 = 225
In the xy-plane, the point (4,3) and (3,2) are on line A. Which of the following equations of lines
is parallel to line A?
a. y = 3x
b. y = 10
c. y = x2
d. y = 2x
e. y = x - ANS e. y = x
Slope of line A is:
m = (y2 - y1)/(x2 - x1) = (3 - 2)/(4 - 3) = 1
Parallel lines have the same slope and only choice (e.) has slope of 1.
,When point A (10,3) is reflected over the y-axis to get the point B, what are the coordinates of
point B?
a. (10,3)
b. (-10,-3)
c. (-10,3)
d. (10,-3)
e. (0,3) - ANS c. (-10,3)
When points reflected over y-axis, the value of y in the coordinates doesn't change and the sign
of the x changes. Therefore, the coordinate point B is (-10, 3).
If f(x) = 2x^3 + 5x^2 + 2x and g(x) = -2, what is the value of f(g(x))?
a. 100x/y
b. 100y/x
c. x/100y
d. y/100x
e. xy/100 - ANS a. 100x/y
Let the number be A. Then:
x = y% * A
Solve for A.
x = y/100 * A
Multiply both sides by 100/y:
x * 100/y = y/100 * 100/y * A
A = 100x/y
If cotangent of an angle β is 1, then tangent of angle β is
a. -1
b. 0
c. 1
d. 2
e. 3 - ANS c. 1
Tangent = 1/cotangent = 1
What is the value of y in the following system of equations?
3x - 4y = -20
-x + 2y = 10
a. -1
b. -2
c. 1
d. 4
e. 5 - ANS e. 5
How long does a 420-mile trip take moving at 50 miles per hour (mph)?
a. 4 hours
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