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soldier1979 [14.2K]
2 years ago
7

An elevator is on the twentieth floor It goes down 15 floors and then up 7 floors what floor is the elevator on now?

Mathematics
2 answers:
TEA [102]2 years ago
5 0

Answer:

12th floor

Step-by-step explanation:

20-15+7 =12

aev [14]2 years ago
4 0

Answer:

The elevator is now on the 12th floor.

Step-by-step explanation:

20-15= 5          

5+7= 12

Therefore your answer is 12.

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A music store sold a total of 27 used trumpets and clarinets in one month. Trumpets cost $149 and clarinets cost $99. If total s
vodomira [7]
Answer: 16

Solution:

1) Use letters to identify the variables:

Number of trumpets: t
Number of clarinets: c

2) Translate each statement into algebraic (mathematical) language.

2.1) Sold a total of 27 used trumpets and clarinets

=> t + c = 27

2.2) Trumpets cost $149 and clarinets cost $99

Total cost of the trumpets: 149t
Total cost of clarinets: 99c

Total cost = 149t + 99c

2.3) Total sales were $3223

=> 149t + 99c = 3223.

3) State the system of equations:

Equation (1) t + c = 27
Equation (2) 149t + 99c = 3223

4) Solve the system of equations:

4.1) Multiply equation 1 by 149:

=> 149t + 149c = 4023

4.2) Subtract the equation (2) from the equation obtained in 4.1

=> 149c - 99c = 4023 - 3223

=> 50c = 800

=> c = 800 / 50 = 16

5) Verify the solution:

From equation (1) t = 27 - 16 = 11

Total cost = 149*11 + 99*16 = 3223

Now you have a verified answer: they sold 16 clarinets
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3 years ago
Which shape could be thought of as being created by stacking congruent polygons?
weqwewe [10]

Answer:

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Step-by-step explanation:

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3 0
3 years ago
The circumference of a circle is 15 meters. Determine the diameter. Use 3 for pie.
erik [133]

Answer:

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Step-by-step explanation:

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Leno4ka [110]

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Step-by-step explanation:

You can either use a calculator, or make both fractions have the denominator of 35 and change the two fractions to be,

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Hope that helps and have a great day!

6 0
3 years ago
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