Solve the problem.Suppose the function y = 0.9t - 2.3 determines the actual time that has elapsed, in minutes, for t minutes of a person's estimate of the elapsed time. Find the actual time that has elapsed for an estimate of 
minutes.
A. 105.7 min
B. 117.93 min
C. 122.07 min
D. 110.3 min
Answer: A
Mathematics
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Solve the equation.3(x + 5) - (3x + 15) = 0
A. 0 B. All real numbers C. 5 D. No solution
Mathematics
Write the number in scientific notation.2,070,000
A. 2.7 × 106 B. 2.07 × 104 C. 2.07 × 105 D. 2.07 × 106
Mathematics
Add or subtract as indicated. You will need to simplify terms to identify like radicals.4
+ 7
A. 10
B. -18
C. 18
D. 11
Mathematics
Provide an appropriate response.Decide whether the elimination method or the substitution method involves the least amount of work. Do not solve. 7x + 5y = -78 5x - 2y = -39
A. Substitution B. Elimination
Mathematics