Graph the lines and find the coordinates of the point of intersection.y = 2x + 1 and y = -2x + 5
A. 
B. 
C. 
D. 
Answer: D
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Fill in the missing value.1 km2 = dm2
A. 100,000,000,000 B. 100,000,000 C. 10,000,000,000 D. 1,000,000,000
Solve the problem.A 3-kilometer roadway under construction is being completed at a pace of one-tenth of its length per week. After 2 weeks, how many meters remain to be completed?
A. 24 m B. 2400 m C. 2.4 m D. 240 m
Solve by the substitution method.8x - 67 = 5y-4x + 3y = -37
A. {(4, -7)} B. {(3, -6)} C. {(x, y)|-4x + 3y = -37} D. ?
The "forgetting curve" for memorizing nonsense syllables is given by equation below, where R is the percentage who remember the syllables after t seconds.
?
, 
?
In how many seconds would only 10% 
of the students remember? Round your answer to the nearest second.
?
Solve for the exact value of t in terms of R.
What will be an ideal response?