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3 years ago

Jylene and her brother had a total of $35.19 to buy school supplies. Jylene’s school supplies cost $12.78

Mathematics

2 answers:

Allushta [10]3 years ago

7 0

Answer:

whats the question

Step-by-step explanation:

Anni [7]3 years ago

6 0

Answer:

What is the question???

Step-by-step explanation:

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The perimeter of a rectangle is 84. If the length is 2 more than three times the width, what are the dimensions of the rectangle

Marina86 [1]

The perimeter solved shows that the dimensions of the rectangle are 32 and 10.

<h3>How to calculate the perimeter</h3>

Let the width be w

Length = 3w + 2

Perimeter = 2(length + width)

Perimeter = 2(3w + 2) + 2w

6w + 4 + 2w = 84

8w + 4 = 84

8w = 84 - 4

w = 80/8

w = 10

Length = 3w + 2

Length = 3(10) + 2

Length = 32

The dimensions of the rectangle are 32 and 10.

Learn more about perimeter on:

brainly.com/question/19819849

5 0

2 years ago

A factory makes car batteries. The probability that a battery is defective is 1/14. If 400 batteries are tested, about how many

Rufina [12.5K]

Answer:

28.6, that is, about 29 are expected to be defective

Step-by-step explanation:

For each battery, there are only two possible outcomes. Either it is defective, or it is not. The probability of a battery being defective is independent of other betteries. So the binomial probability distribution is used to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

The expected value of the binomial distribution is:

$E(X) = np$

The probability that a battery is defective is 1/14.

This means that $p = \frac{1}{14}$

400 batteries.

This means that $n = 400$

How many are expected to be defective?

$E(X) = np = 400*\frac{1}{14} = 28.6$

28.6, that is, about 29 are expected to be defective

3 0

3 years ago

[Please help] At the mall, Leona bought a T-shirt and a book for a total of $28. The book cost $12. How much did the T-shirt cos

podryga [215]

Answer:

the T-shirt cost is $16

Step-by-step explanation:

first, we know the total cost of the shirt and book was $28 so we substract 12 from 28 wich gives us 16 so the cost of the shirt is $16.

8 0

3 years ago

A tennis ball can in the shape of a right circular cylinder holds four tennis balls snugly. If the radius of a tennis ball is 3.

Volgvan

Answer:

about 33.3%

Step-by-step explanation:

The fraction of space not occupied will be the same as the unoccupied fraction of a cylinder of the same height and diameter as a sphere.

<h3>Volume of a cylinder</h3>

The volume of a cylinder of diameter d and height d will be ...

V = πr²h = π(d/2)²(d) = (π/4)d³

<h3>Volume of a sphere</h3>

The volume of a sphere of diameter d is ...

V = 4/3πr³ = 4/3π(d/2)³ = (π/6)d³

<h3>Unoccupied space</h3>

The fraction of space that is occupied is ...

occupied space = (sphere volume)/(cylinder volume)

occupied space = ((π/6)d³) / ((π/4)d³) = 4/6 = 2/3

The fraction of unoccupied space is ...

unoccupied fraction = 1 -2/3 = 1/3

unoccupied fraction ≈ 33.3%

3 0

2 years ago

Read 2 more answers

What 18/25 simplest form?

bezimeni [28]

It is already simplified because there is nothing you can divide into both 18 and 25 that would result in whole numbers.

3 0

3 years ago