Question

Emma is training for a 10-kilometer race. She wants to beat her last 10-kilometer time, which was 1 hour 10 minutes. Emma has already run for 55 minutes. Which inequality can be used to find how much longer she can run and still beat her previous time? (1 hr = 60 min)

70 greater-than 7 minus 55
70 less-than t minus 55
70 less-than-or-equal-to t + 55
70 greater-than t + 55
x + 6 less-than negative 8

x + 4 greater-than-or-equal-to negative 6

x minus 3 greater-than negative 10

x + 5 less-than-or-equal-to negative 4

A
B
C
D

Answer 1

Answer:the answer is D

Explanation:

Answer 2

`70 > 55 + t`

Explanation:

Given

`Previous\ Time = 1\ hr\ 10\ mins`

`Current\ Time = 55\ mins`

Required

Represent the additional time needed as an inequality

Convert the previous time to minutes

`Previous\ Time = 1\ hr\ 10\ mins`

`Previous\ Time = 1 * 60\ mins + 10\ mins`

`Previous\ Time = 60\ mins + 10\ mins`

`Previous\ Time = 70\ mins`

Let the additional time be t

This means that she needs to run at least t minutes to beat her previous record

To beat her previous record, the sum of current time and x must be less than her previous time. i.e.

`55 + t < 70`

This can be rewritten as:

`70 > 55 + t`