Welcome to our “Daily Math Practice Challenge: Preparing for the ACT Exam”! This challenge is designed to help you engage in targeted math practice every day, gearing up for the ACT exam. Through daily exercises, you will enhance your problem-solving speed, deepen your understanding of mathematical concepts, and strengthen your ability to tackle a variety of math problems.
1. The equations of four (x,y) relations are given below.
The graph in the standard (x,y) coordinate plane of each of these relations is shown below.
Of these relations, which are functions?
A. I only
B. I and III only
C. I and IV only
D. I, II, and III only
E. I, III, and IV only
2. If (x + k)² = x² + 88x + k², then k = ?
F. 044
G. 088
H. 176
J. 352
K. 704
3. Which of the following expressions is equal to \( \frac{1}{3}+\frac{2}{9}+\frac{1}{10} \)？
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