Question

Cedric plans to ride his bicycle 2 miles to a park and then ride several times around a loop in the park that is 5 miles long. Then he'll ride the same way home. He wants to ride a total of at least 19 miles. The inequality 5t+4>19 models this situation, where t is the number of times Cedric rides around the loop. Solve the inequality. How many times does Cedric need to ride around the loop? A. 3 or more times B. At most 4 C. At most 3 times D. 4 or more times

Answer 1

5t+4>19------------------ > 5t > (19-4)
5t > (19-4)----------------- > 5t >15---------------- > t >15/5------ > t >3

the solution of this inequality is (3, ∞)

the answer is D. 4 or more times

Answer 2

Answer: option 3 or more times

Step-by-step explanation:

1) First, I would like to explain how to get the inequality:

Cedric plans to ride his bicycle 2 miles to a park and then ride several times around a loop in the park that is 5 miles long.

number of times around the loop of 5 miles long: t

number of miles around the loop: 5t

number of miles from home to the park and from park to home: 2 + 2 = 4.

total number of miles: 5t + 4

He wants to ride a total of at least 19 miles => 5t+4 ≥ 19

So the inequality that models this situation is 5t + 4 ≥ 19 (notice that the inequality simbol is ≥ and not >)

2) Now we can solve the inequality, with a better understanding of what it means.

5t ≥ 19 - 4

5t ≥ 15

t ≥ 15 / 5

t ≥ 3

Then, the right answer is the option 3 or more times