Solve the problem. If necessary, round to the nearest tenth, unless intructed otherwise.Tickets for a play are sold at two prices; $18, and $30. Find a formula for the total cost T (in dollars) of k tickets that sold for $18 per ticket and n tickets that sold for $30 per ticket.
A. T = 18k - 30n
B. T = 30k + 18n
C. T = 48kn
D. T = 18k + 30n
Answer: D
Mathematics
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Solve the equation.7.1m + 2m - m = 30.78
A. 7.1 B. 3.8 C. 8.1 D. 38
Mathematics
Write a formula for the general term (the nth term) of the arithmetic sequence. Then use the formula for an to find a20, the 20th term of the sequence.8, 2 , -4, -10, . . .
A. an = 8 - 6n; a20 = -112 B. an = 6n - 14; a20 = 106 C. an = 14 - 6n; a20 = -106 D. an = 6n - 8; a20 = 112
Mathematics
Find values of x and y such that both fx(x, y) = 0 and fy(x, y) = 0.f(x,y) = x3 + y3 - 9xy
A. x = 3, y = 3 B. x = -3, y = -3 C. x = 0, y = 0 D. x = 1, y = 1
Mathematics
Perform the indicated operation. Write the answer in simplest form. If the answer is an improper fraction, write it as a mixed number.
A. 16
B. 15
C. 7
D. 7
Mathematics