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labwork [276]
3 years ago
7

A group of 20 dogs are at the dog park. Fourteen of the dogs have an average weight of 45 pounds. The remaining dogs have an ave

rage weight of 20 pounds.
Mathematics
2 answers:
djverab [1.8K]3 years ago
8 0
6 dogs have an average weight of 20 pounds

marishachu [46]3 years ago
6 0

Answer: The correct answer is 37.5 I know because I took the test

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the side length ofthe square porch behind macis house is (3x + 2) feet. The porch has a perimeter of (14x - 2) feet. What are th
andriy [413]

Answer:

The porch is 17 ft by 17 ft

Step-by-step explanation:

The perimeter of a square is

P = 4s where s is the side length

P = 4( 3x+2)

P = 12x+8

We know P = 14x-2

14x-2 = 12x+8

Subtract 12x from each side

14x-2 -12x = 12x+8-12x

2x -2 = 8

Add 2 to each side

2x-2 +2 = 8+2

2x= 10

Divide by 2

2x/2 = 10/2

x = 5

The side  is 3x+2

                 3*5+2

                  15+2

                   17

The porch is 17 ft by 17 ft

5 0
4 years ago
What is the simplified form of 4r + 5s – 16r + 3s?
irakobra [83]
Hello!

You can only combine numbers with the same variable

4r - 16r = -12r
5s + 3s = 8s

The answer is -12r + 8s

Hope this helps!
8 0
3 years ago
Read 2 more answers
Assume that thermometer readings are normally distributed with a mean of degrees and a standard deviation of 1.00degrees C. A th
Andrew [12]

Answer:

0.2684 is the probability that the temperature reading is between 0.50 and 1.75.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 0 degrees

Standard Deviation, σ = 1 degrees

We are given that the distribution of thermometer readings is a bell shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

P(Between 0.50 degrees and 1.75 degrees)

P(0.50 \leq x \leq 1.75)\\\\ = P(\displaystyle\frac{0.50 - 0}{1} \leq z \leq \displaystyle\frac{1.75-0}{1})\\\\ = P(0.50 \leq z \leq 1.75)\\= P(z \leq 1.75) - P(z < 0.50)\\= 0.9599 - 0.6915 = 0.2684 = 26.84\%

0.2684 is the probability that the temperature reading is between 0.50 and 1.75.

7 0
3 years ago
PLEASS HELPP!!!!!!! PICTURE SHOWN
ohaa [14]
The volume is 0.52 mm^3
Answer is C

Hope it helps!
5 0
3 years ago
Raul is building a house. On day 1, he uses 3 bags of cement. On each of the following 3 days, he uses 3 times the number of bag
Ksivusya [100]
18bags 
Look if 1=3 2=9 3= 18  so he uses 18 bags!
8 0
4 years ago
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