Shontelle has soccer practice on Thursday evening. She has a half hour before practice to work on her math homework and talk to her friends. She has 20 math skill-work questions for homework, and she wants to complete them before talking with her friends. If she can solve three math problems in four minutes when she really focuses with no distractions, how many minutes will Shontelle have left after completing her math homework to talk to her friends.

3 1/3 minutes or 3 minutes 20 seconds

Step-by-step explanation:

We can use ratios to see how long it will take her to complete her homework

3 problems     20 problems

=

4 minutes        x minutes

Using cross products

3x = 4*20

3x= 80

Divide by 3

x = 80/3

x =26 2/3 minutes

She has 30 minutes

30 -26 2/3 = 3 1/3 minutes

3 minutes 20 seconds

a function could be identified in 3 ways either on a chart,graph, or ordered pairs. first a function is that each point has its own. the rule is that there can be many x's to one y but there can not be 2 x's at different y's. so on a graph when you put a straight line through the y's there should be one dot only to be a function.

step-by-step explanation: