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3 years ago

8. Write the multiplicative inverse of each number.a. 7 b. -2c. 1 d. 0°

Mathematics

1 answer:

horsena [70]3 years ago

6 0

Answer:

a: -1/7

b: 1/2

c: -1

d: none

Step-by-step explanation:

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Let s = northbound train
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4s + 8s = 600
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Question 1 Answer:

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Mom and Aunt 2 would make centerpieces.

You and Grandma 2 would blow up balloons.

Since you are pairing up to complete the tasks, these pairs each have the shortest times in their respective categories and therefore are the most logical pairing to complete tasks.

Question 2 Answer:

We use algebra and our previous pairings to determine the length of each task.

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x = time together

$\frac{1}{x}$ = rate of completion

Aunt 1 = $\frac{1}{1.5}$ Grandma 1 = $\frac{1}{2}$

$\frac{2}{3} +\frac{1}{2} = \frac{1}{x}$

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Centerpieces --> 7/4 hours

x = time together $\frac{1}{x}$ = rate of completion

Mom = $\frac{1}{3.5}$ Aunt 2 = $\frac{1}{3.5}$

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$\frac{4}{7} = \frac{1}{x}$

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x = time together $\frac{1}{x}$ = rate of completion

You = $\frac{1}{1.5}$ Grandma 2 = $\frac{1}{2.5}$

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Shortest amount of time to complete all tasks is:

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Converting hours to hours and minutes --> 3 hours 32 minutes

Therefore they must arrive by 5:28pm to complete the tasks in time to leave at 9:00pm.

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3 years ago

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