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larisa86 [58]
3 years ago
14

The lengths of the sides of a rectangle are in a ratio of 4:7. If the length is 31.5 in, find the width, perimeter, and area of

this rectangle.
Mathematics
1 answer:
Blababa [14]3 years ago
6 0

Answer:

L = 31.5 w = (4/7)31.5 = 18 p = 2 * 31.5 + 2 * 18 A = 31.5 * 18

Step-by-step explanation:

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Bob and Anna are planning to meet for lunch at Sally's Restaurant, but they forgot to schedule a time. Bob and Anna are each goi
Viktor [21]

Answer:

The expected cost is $8.75

<em></em>

Step-by-step explanation:

Given

Time = \{1pm, 2pm, 3pm, 4pm\}

C_1 = \$5 --- If Bob and Anna meet

C_2 = \$10 --- If Bob and Anna do not meet

Required

The expected cost of  Bob's meal

First, we list out all possible time both Bob and Anna can select

We have:

(Bob,Anna) = \{(1,1),(1,2),(1,3),(1,4),(2,1),(2,2),(2,3),(2,4),(3,1),(3,2),(3,3),(3,4),(4,1),(4,2),(4,3),(4,4)\}

n(Bob, Anna) = 16

The outcome of them meeting at the same time is:

Same\ Time = \{(1,1),(2,2),(3,3),(4,4)\}

n(Same\ Time) = 4

The probability of them meeting at the same time is:

Pr(Same\ Time)  = \frac{n(Same\ Time)}{n(Bob,Anna)}

Pr(Same\ Time)  = \frac{4}{16}

Pr(Same\ Time)  = \frac{1}{4}

The outcome of them not meeting:

Different = \(Bob,Anna) = \{(1,2),(1,3),(1,4),(2,1),(2,3),(2,4),(3,1),(3,2)

,(3,4),(4,1),(4,2),(4,3)\}

n(Different) = 12

The probability of them meeting at the same time is:

Pr(Different)  = \frac{n(Different)}{n(Bob,Anna)}

Pr(Different)  = \frac{12}{16}

Pr(Different)  = \frac{3}{4}

The expected cost is then calculated as:

Expected = C_1 * P(Same) + C_2 * P(Different)

Expected = \$5 * \frac{1}{4} + \$10 * \frac{3}{4}

Expected = \frac{\$5}{4} + \frac{\$30}{4}

Take LCM

Expected = \frac{\$5+\$30}{4}

Expected = \frac{\$35}{4}

Expected = \$8.75

<em>The expected cost is $8.75</em>

4 0
2 years ago
You use 4 gallons of water on 14 plants in your garden.At this rate, how much water will it take to water 35 plants?
Naddika [18.5K]

For this case we can make the following rule of three:

4 gallons --------------> 14 plants

x --------------------------> 35 plants

From here, we clear the value of x.

We have then:

x = (\frac{35}{14}) * (4)\\x = 10

therefore, 10 gallons are needed to irrigate 35 plants.

Answer:

it will take 10 gallons to water 35 plants

6 0
3 years ago
Read 2 more answers
mean of 164,175,178,166,167,145,176,150,174,162,180,156,173,158,182,184,160,172,186,168,195,169,171,187,170
Karo-lina-s [1.5K]

Answer:

170.72

Step-by-step explanation:

to find the mean, we must add al the numbers and divide it by n

that is,

164,175,178,166,167,145,176,150,174,162,180,156,173,158,182,184,160,172,186,168,195,169,171,187,170 we have to add al these numbers and divide it by 25

sum- 4628 divided by 25

=170.72

7 0
2 years ago
The plan of a park is at a scale of 1:5000. Calculate the actual distance between two points if the distance between two points
Svetllana [295]
7 cm: 35000 cm (7*5000)
2.8 cm: 14000 cm (2.8*5000)
2 cm: 10000 cm (2*5000)
4 0
3 years ago
Which statements can be used to justify the fact that two right angles are supplementary? Select two options.
agasfer [191]

Answer:

A right angle measures 90°.

A supplementary angle is twice the measure of a complementary angle.

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
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