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vladimir2022 [97]
3 years ago
7

The average weight of three dogs is 55 pounds, and the average weight of five cats is 9 pounds. What is the average weight, in p

ounds, of all eight animals
Mathematics
1 answer:
riadik2000 [5.3K]3 years ago
8 0

Answer:

8 lbs

Step-by-step explanation:

I hope this helps answer your question(s). Please mark brainliest.

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Which number property does the following statement represent? 25 × (18 + 82) = (25 × 18) + (25 × 82)
motikmotik

Answer:

Distributive property

342 is correct

Step-by-step explanation:

hope this helps u

8 0
2 years ago
A coin mint has a specification that a particular coin has a mean weight of
Serggg [28]
<span>Null Hypothesis:µ equals 2.5Alternative Hypothesis: µ not equal to 2.5 Z Test Test Statistic, Ztest: -18.1912 Critical Zcritical: ±1.9607 P-Value: 0,0000 As Ztest is not within the limits of Zcritical we can reject the null hypothesis  95% Confidence interval: 2.495746 < µ < 2.496574</span>
6 0
4 years ago
Evaluate the expression when a = 2.<br> a^2+7a+7
Galina-37 [17]

Answer:

25

Step-by-step explanation:

a² + 7a + 7

a = 2

Plug in the value of 2 for every occurance of a.

(2)² + 7(2) + 7

First, solve the exponent.

4 + 7(2) + 7

Now, multiply.

4 + 14 + 7.

Add.

25

This is your answer.

Hope this helps!

7 0
3 years ago
Water flows into a swimming pool at the rate of 8.0 gal/min. The pool is 16 ft wide, 32 ft long and 8.0 ft deep. How long does i
Lady_Fox [76]

1 foot = 12 inches

(1 foot)^3 = (12 inches)^3

1 cubic foot = (12^3) cubic inches

1 cubic foot = 1728 cubic inches, will be used as a conversion factor

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

Find the volume of the pool. Assume it is a rectangular prism.

Volume = length*width*height

Volume = 32*16*8

Volume = 4096 cubic feet

Multiply by 1728, which was the conversion factor found earlier, to convert from cubic feet to cubic inches.

4096 cubic feet = (4096*1728) cubic inches = 7077888 cubic inches

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

Now use the fact that 1 gallon = 231 cubic inches to convert from cubic inches to gallons

7077888 cubic inches = (7077888 cubic inches)*(1 gallon/231 cubic inches) = 7077888/231 = 30640.2078 gallons which is approximate

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

If x is the amount of time in minutes, then 8x gallons of water have been added after x minutes. Set this equal to 30640.2078 and solve for x

8x = 30640.2078

x = 30640.2078/8

x = 3830.02598

Divide this by 60 to convert to hours

3830.02598/60 = 63.8337663

<h3>It takes approximately 63.8 hours to fill the pool</h3>

This is approximately 63.8/24 = 2.625 days

8 0
3 years ago
Vina is asked to graph this system of equations
Phantasy [73]

Answer: b

Step-by-step explanation:

3 0
3 years ago
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