Solve.How much pure acid should be mixed with 2 gallons of a 50% acid solution in order to get an 80% acid solution?
A. 3 gal
B. 5 gal
C. 1 gal
D. 8 gal
Answer: A
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Solve the problem.The charges for renting a moving van are $65 for the first 40 miles and $7 for each additional mile. Assume that a fraction of a mile is rounded up. a. Determine the cost of driving the van 98 miles.b. Find a symbolic representation for a function f that computes the cost of driving the van x miles, where 
(Hint: express f as a piecewise-constant function.)
A. a. $471; b. f(x) =
B. a. $6776; b. f(x) =
C. a. $1031; b. f(x) =
D. a. $471; b. f(x) =
Provide an appropriate response.Explain how (-7)6 and -76 are different.
What will be an ideal response?
Solve the system by the substitution method.
A. (9, 0) B. (9, 0), (-9, 0) C. (-9, 0) D. ?
Solve the problem.On a biology test, a student got 25 questions correct but did not pass. On a second attempt, the student got 37 questions correct. What was the percent of increase?
A. 48% B. 52% C. 12% D. 32.4%