2 years ago

Trina is trying to decide which lunch combination to order at a sandwich shop: 4, 5, 6, or 7.

Mathematics

1 answer:

Anarel [89]2 years ago

3 0

Answer:

Step-by-step explanation:

3 * 2 = 6

hope it's helpful

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| 15. Aliyah runs approximately 5.4 miles per hour.

miss Akunina [59]

Answer: 33.33 minutes longer.

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We need to remember the following formula:

$t=\frac{d}{V}$

Where "t" is the time, "d" is the distance and "V" is the speed.

We know that she runs approximately 5.4 miles per hour, then:

$V=5.4\ \frac{mi}{h}$

Since she plans to run 9 miles on Tuesday, her run's time on Tuesday will be:

$t_1=\frac{9\ mi}{5.4\ \frac{mi}{h}}\\\\t_1=\frac{5}{3}\ h$

Making the conversion from hours to minutes, we get:

$(\frac{5}{3}\ h)(\frac{60\ min}{1\ h})=100\ min$

Since she plans to run 12 miles on Thursday, her run's time on that day will be:

$t_2=\frac{12\ mi}{5.4\ \frac{mi}{h}}\\\\t_2=\frac{20}{9}\ h$

Making the conversion from hours to minutes, we get:

$(\frac{20}{9}\ h)(\frac{60\ min}{1\ h})=133.33\ min$

Finally in order to find how many longer will her run be on Thursday compared to Tuesday, we need to make the following subtraction:

$t_2-t_1=133.33\ min-100\ min=33.33\ min$

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