Question

NEED HELP ASAP!!

Soro bought a $50.00 bus card at the beginning of the week. Each bus ride costs $2.50. He needs to have at least $20.00 on his card at the end of this month.To determine how many bus rides he can take between now and the end of this month, Soro wrote and solved the following inequality:



What error, if any, did Soro make when writing or solving this inequality?
A)Soro’s original inequality should have been .
B)Soro should have added 2.5 to each side for his first step.
C)Soro should have reversed the inequality symbol when using the division property of inequality.
D)Soro’s work shows no errors.

Answer 1

Answer: c

Explanation:

Answer 2

The answer is C.

Note when Soro divides both sides by -2.5 to solve the equation. When multiplying/dividing by a negative number, one should always reverse the inequality sign, but Soro forgot to do this.

-2.5x≥-30

After this step, the answer SHOULD HAVE been:

x≤12

Let me know if you need any clarifications, thanks!