First, use front end rounding to estimate each answer. Then find the exact answer.The fully loaded car cost $2357 more than the basic model. If the basic model cost $18,433, what did the fully loaded car cost?
A. estimate: $18,400 + $2300 = $20,700; exact: $20,790
B. estimate: $18,000 + $2000 = $20,000; exact: $20,790
C. estimate: $18,000 + $2300 = $20,300; exact: $20,790
D. estimate: $20,000 + $2000 = $22,000; exact: $20,790
Answer: D
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Answer the question or write an explanation.Because 
= 4 with remainder 1, it follows that
Fill in the blank(s) with the appropriate word(s).
Solve the problem.When making a telephone call using a calling card, a call lasting 3 minutes cost $1.65. A call lasting 12 minutes cost $5.25. Let y be the cost of making a call lasting x minutes using a calling card. Write a linear equation that models the cost of a making a call lasting x minutes.
A. y = 0.4x - 6.75
B. y = 0.4x + 0.45
C. y = -0.4x + 2.85
D. y = 
x - 
Multiply and, if possible, simplify.
? 
A. 
B. 
C. 
D. 
Find the value of the variable that satisfies the equation.3 = 5x - 7
A. x = 9 B. x = 7 C. x = 2 D. x = 5