AlgebraEasyCost of a ten-minute call
Algebra practice question
The cost C, in dollars, of a phone call lasting m minutes is given by C(m) = 0.1m + 0.5. What is the cost, in dollars, of a 10-minute call?
Answer: 1.5 or 3/2
0.1(10) + 0.5 = 1 + 0.5 = 1.5.
Common wrong answers
- If you answered 1
- 1 forgets the 0.5 connection charge.
- If you answered 5.5
- 5.5 uses 0.5 per minute and 0.1 fixed.
- If you answered 10.5
- 10.5 adds 10 and 0.5 without multiplying by 0.1.
More Algebra questions
- Easy
If 3x + 7 = 22, what is the value of x? - Easy
If x/4 = 9, what is the value of x? - Easy
The function f is defined by f(x) = 6x − 5. What is the value of f(3)? - Easy
The perimeter P of a rectangle with length l and width w is given by P = 2l + 2w. Which of the following expre… - Easy
Which equation defines the function f? - Easy
In the xy-plane, the graph of the equation y = 4x − 12 crosses the x-axis at the point (a, 0). What is the val…
Not affiliated with the College Board. SAT is a trademark of the College Board.