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olga2289 [7]
3 years ago
11

IISLUCIO

Mathematics
1 answer:
Alex3 years ago
3 0
Answer:
3.95m + 8.95b = 47.65
Why?
It cannot be the first or second equation since the total amount was $47.65, not $60.55 or $47.95.
It’s either the third or fourth equation. You can tell it’s the third one since in the question it states “Let m represent the number of magazines and b represent the number of books.” The fourth equation gets it reversed by saying each magazine costs $8.95 and each book costs $3.95, when in reality it’s the other way around.
Therefore, the third equation most accurately depicts this situation.
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The number -13 can be classified as:
pogonyaev
<h3>Answer: Choice B) real and integer</h3>

Explanation:

The set of integers is {..., -3, -2, -1, 0, 1, 2, 3, ...} basically its the set of positive and negative whole numbers, including 0 as well. The set of whole numbers is {0, 1, 2, 3, 4, ...} so any positive number that does not a fractional or decimal part. The value 0 is included in the set of whole numbers. The natural numbers is {1, 2, 3, 4, ...} so it is the set of whole numbers but we kicked out 0 from this set. The set of natural numbers is also called the set of counting numbers.

If we take any two integers and divide them then you'll get a rational number. You cannot have zero in the denominator, but you can have any other integer. For example,  2 and 3 divide to get the fraction 2/3 which is a rational number. Numbers that we cannot express as a fraction of two integers are said to be irrational. An example of this is pi = 3.14 which is irrational. We cannot write pi as a ratio of two integers. One approximation is pi = 22/7, but this doesn't represent pi exactly. Any integer itself is rational. Something like -13 can be written as -13/1, so we cannot say -13 is irrational. That rules out choice A. Choice C is ruled out because negative numbers aren't natural numbers. The same can be said about -13 not being part of the whole number set {0, 1, 2, 3, 4, ...} so choice D is also false.

7 0
3 years ago
Cylinder A and cylinder B have the same height. Cylinder A has a radius that is twice as long as cylinder B's. Which
arlik [135]

Answer: B The volume of cylinder A is four times the volume of cylinder B

Step-by-step explanation:

I got it right

8 0
3 years ago
Read 2 more answers
Is this a polygon or not a polygon
Fantom [35]

This is not a polygon as it has a section (at the bottom) which is composed of non-straight segments.

5 0
3 years ago
The perimeter of the triangle is 41 inches. The perimeter of the rectangle is 66 inches.
Korolek [52]

Answer:

Part A)  The system of equations is equal to

41=4x+7y

33=(3x+7y)

Part B)

The length is 24\ in

The width is 9\ in

Step-by-step explanation:

Part A)

we know that

The perimeter of the triangle is equal to the sum of the length of its three sides

In this problem

41=x+3x+7y

41=4x+7y -----> equation A

The perimeter of rectangle is equal to

P=2(L+W)

In this problem

66=2(3x+7y)

33=(3x+7y) ------> equation B

Part B)

Using a graphing tool

Solve the system of equations

We know that

The intersection point both graphs is the solution of the system of equations

41=4x+7y

33=(3x+7y)

The intersection point is (8,9/7)

see the attached figure

x=8\ in

y=(9/7)\ in

step 3

Find the length and width of the rectangle

The length is 3x

3*8=24\ in

The width is 7y

7*(9/7)=9\ in

7 0
3 years ago
Read 2 more answers
annual sales for a company are $149,999 and are increasing at a rate of 6% per year. write an exponential growth function to mod
elixir [45]

Answer:

  • S(t) = 149999(1.06)^t
  • $225543

Step-by-step explanation:

  • Initial value is $149999
  • Increase rate is 6% per year = 1.06 times

<u>The model of the growth is:</u>

  • S(t) = 149999(1.06)^t, where S- amount of annual sales, t- time in years, 1.06- growth rate per year

<u>Annual sales after 7 years:</u>

  • S(7) = 149999(1.06)^7 = $225543
4 0
3 years ago
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