Question

Laura is playing a performance on her piano for a contest. The contest states that she must play a 10-minute piano song (600 seconds) and her timing must be perfect. For each second she goes over or under 10 minutes, 2 points are taken off. Which expression can be used to determine the number of points that should be taken off her score if she plays for s seconds?a. 10|s-5| b. 10|s-600| c. 2|s-5| d. 2|s-600|

Answer 1

D

Explanation:

|s-600| is the number of seconds that Laura plays above or under 600 seconds.

Multiply by 2 to find the score deducted

Answer 2

d. 2|s-600|

Is-600I is the number of seconds that Laura plays above or under 600 seconds. 2 points are taken off for every second she goes beyond the 10 minutes allotted, so multiply it by 2 to get the number of points deducted.

Hope this helps!