Solve.When making a telephone call using a calling card, a call lasting 3 minutes cost $1.20. A call lasting 13 minutes cost $3.70. Let y be the cost of making a call lasting x minutes using a calling card. Write a linear equation that relates the cost of a making a call, y, to the time x.
A. y = -0.25x + 1.95
B. y = 0.25x - 9.3
C. y = 0.25x + 0.45
D. y = 4x - 
Answer: C
Mathematics
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Write the polynomial in standard form and identify the degree and leading coefficient of the polynomial.
?
?
A. 
Degree: 1; Leading coefficient: -1
B. ?
Degree: 16; Leading coefficient: 1
C.
Degree: 3; Leading coefficient: 1
D.
Degree: 2; Leading coefficient: -16
E.
Degree: 2; Leading coefficient: 16
Mathematics
Solve.How much commission will an agent make on the sale of a $781,900 house if he receives 
of the selling price?
A. $11,728.50 B. $1172.85 C. $5212.67 D. $52,126.67
Mathematics
Solve the equation for the interval [0, 2?).cos2 x - cos x = 0
A. 
, 
B. 0, 
, 
C. 0, 
, ?, 
D. 
, ?
Mathematics
Find the equation of the line that passes through the points (0, 3) and (–5, 6).
Mathematics