ACT Math Help for Elementary Algebra - Exercises and formulas for algebraic expressions and algebraic operations
1. How many solutions exist for the following equation:
x2 + 8 = 0
a. 0
B. 1
C. 2
D. 4
E. 8
Elementary Algebra Answer 1
2. Consider a class which has
n students. In this class,
t% of the students subscribe to digital TV packages. Which of the following equations represents the number of students who do NOT subscribe to any digital TV package?
F. 100(
n -
t)
G. (100 -
t)
n ÷ 100
H. (100 -
t)
n ´ 100
J. (1 -
t)
n
K.
n -
t
Elementary Algebra Answer 2
3. An internet provider sells internet packages based on low monthly rates. The price for the internet service depends on the speed of the internet connection. The chart below indicates the prices of the various internet packages:
| Price in dollars (P) |
10 |
20 |
30 |
40 |
| Gigabyte speed (S) |
2 |
4 |
6 |
8 |
Which equation represents the prices of these internet packages?
A.
P = (
S - 5)
´ 5
B.
P = (
S + 5)
´ 5
C.
P = 5 ÷
S
D.
P =
S ´ 5
E.
P =
S ÷ 5
Elementary Algebra Answer 3
4. What is the largest possible product of 2 even integers whose sum is 22?
F. 11
G. 44
H. 100
J. 120
K. 144
Elementary Algebra Answer 4
5. Which of the following equations is equal to
Ö45?
A. 1 ÷ 45
B. 5
Ö9
C. 9
Ö5
D. 3
Ö5
E. 5
Ö3
Elementary Algebra Answer 5
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