3 years ago

Jan takes her three children and two neighbors children to a matinee.all of the children are under age 13.

Mathematics

1 answer:

podryga [215]3 years ago

5 0

What the questions?????

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Diana had a large stack of playing cards. She knew that 17 of them were kings. She took a sample of 30 cards and found 4 kings.

Mandarinka [93]

Answer:

Diana approximately had 128 cards

Step-by-step explanation:

Let n be the number of cards Diana had. She knows that

there are 17 kings among n cards
4 kings among 30 cards

Write a proportion:

$\dfrac{17}{n}=\dfrac{4}{30}$

Cross multiply:

$4n=17\cdot 30\\ \\4n=510\\ \\n=\dfrac{510}{4}=127.5\approx 128$

5 0

3 years ago

The Library is 1.75 miles directly north of the school the park is 0.6 miles directly south of the school.How far is the library

statuscvo [17]

Answer: 2.35 miles

Check out the attached image below. A drawing often helps visualize the problem. In this case, all three locations are along the same vertical line. The distances 1.75 and 0.6 can be added up as those smaller segments form the entire distance we want (from park to library). So that's how I got 1.75+0.6 = 2.35