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Troyanec [42]
2 years ago
5

the perimeter of a rectangular floor is 100 feet . Find the dimensions of the floor , if the length is four times the width​

Mathematics
2 answers:
schepotkina [342]2 years ago
3 0
<h3>Answers:  </h3>

Width = 10 feet

Length = 40 feet

================================================

Explanation:

W = width

L = 4W = four times the width = length

P = perimeter

P = 2*(W+L)

P = 2*(W+4W)

P = 2(5W)

P = 10W

The perimeter is 100 feet.

P = 100

10W = 100 .... plug in P = 10W

W = 100/10 .... divide both sides by 10

W = 10

The width is 10 feet.

L = 4W

L = 4*10

L = 40

The length is 40 feet.

-----------------

Check:

P = 2(L+W)

P = 2(40+10)

P = 2(50)

P = 100

or another way to check is to add up the four sides {10, 40, 10, 40}

10+40+10+40 = 50+50 = 100

This confirms the answer.

ryzh [129]2 years ago
3 0

Answer:

<h2>Width = 10 feet</h2><h2>Length = 40 feet</h2>

Step-by-step explanation:

Perimeter (P) = 2L + 2W

where

P = 100 feet

L = 4W

plugin values into the formula:

100 = 2(4W) + 2W

100 = 8W + 2W

100 = 10W

W = 100/10

W = 10 feet

L = 4W

L = 4(10)

L = 40 feet

P = 2(40) + 2(10)

P = 80 + 20

P = 100

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STatiana [176]

Answer:

c = 12

Step-by-step explanation:

3(c - 4) = 4(c - 6)

Use the distributive property on each side.

3c - 12 = 4c - 24

Now you need the terms with c on the left side and the numbers on the right side. Subtract 4c from both sides. Add 12 to both sides.

3c - 4c - 12 + 12 = 4c - 4c - 24 + 12

Combine like terms on each side.

-c = -12

Multiply both sides by -1.

c = 12

4 0
2 years ago
Read 2 more answers
Am i correct i chose c but i might think is wrong (valid answer only!!)
hoa [83]

Answer:

You are absolutely correct!

Step-by-step explanation:

The correct answer is C!

Hope this helps you realize!

8 0
2 years ago
Help please!<br> Thank you
Margarita [4]

Answer:

G

Step-by-step explanation:

Red marble probably currently: 12/32 = 3/8

Guess and check (using the multiple choice answers):

F: 12 + 13 / 32 + 13 = 25/45 = 5/6; does not equal 3/5

G: 12 + 18 / 32 + 18 = 30/50 = 3/5; does equal 3/5

H: 12 + 28 / 32 + 28 = 40/60 = 2/3; does not equal 3/5

J: 12 + 32 / 32 + 32 = 44/64 = 11/16; does not equal 3/5

K: 12 + 40 / 32 + 40 = 52/72 = 13/18; does not equal 3/5

8 0
3 years ago
The average annual salary for 35 of a company’s 1200 accountants is $57,000. This describes a parameter.
zzz [600]
Yes it describes only a parameter because <span>a numerical characteristic of a population, as distinct from a statistic of a sample was use. only 35 out of the 1200 accountants salary was used in calculating an average salary. it will be real if use all the number of accountant in calculating the average salary</span>
8 0
2 years ago
A grocery bag can be classified as either paper or plastic. Suppose that 85​% of grocery bags are classified as plastic. ​(a) Tw
hjlf

Answer:

a) 0.7225

b) 0.5220

c) 0.478

It is not unusual.

Step-by-step explanation:

Probability grocery bags are plastic = 85% = 0.85

a) If two grocery bags are chosen at random, the probability that both grocery bags are plastic would be:

^2C_2 (0.85)^2 (1-0.85)^0

= (0.85)^2 = 0.7225

b) If four bags are chosen at random, the probability that all are plastic:

^4C_4 (0.85)^4 (1-0.85)^0

= (0.85)^4 = 0.5220

Probability all four bags chosen randomly are plastic bags is 0.5220

c) The probability that at least one of four randomly selected grocery bags is paper:

Let's first check for the probability of getting a paper bag.

P(paper bag) = 1 - 0.85 = 0.15

Probability of getting a paper bag is 0.15

Probability that at least one of four randomly selected grocery bags is paper would be:

1 - ^4C_0(0.15)^0 (0. 85)^4

= 1 - (1)(0.85)^4

= 1 - 0.5220

= 0.478

Since the probability that at least one bag is paper, 0.478 is greater than 0.05, it is not unusual.

3 0
2 years ago
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