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Margaret [11]
2 years ago
7

Add. 7/4+9/-5 wrote your answer as a fraction in simplest form

Mathematics
2 answers:
IgorLugansk [536]2 years ago
5 0

Answer:

7/4 + 9/-5 =

Since the denominator of the second fraction is negative the sign will change from negative to positive

We will get

7/4 - 9/5

First find the LCM

LCM of 4 and 5 is 20

7/4 - 9/5 = 5(7) - 4(9)/ 20

Simplify

We get

35 - 36/20

= -1/20

Hope this helps

kondor19780726 [428]2 years ago
4 0

Answer:

-1/20

Step-by-step explanation:

7/4 + -9/5

We need a common denominator, which is 20

7/4 *5/5   + -9/5 *4/4

35/20  + -36/20

Add the numerators together

-1/20

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Answer: 330 regular tickets, 46 premium tickets and 64 elite tickets were sold.

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Let x represent the number of regular tickets that were sold.

Let y represent the number of premium tickets that were sold.

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x + y + z = 440- - - - - - - - - -1

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5x + 15y + 25z = 3940- - - - - - - - - 2

The number of regular tickets was three times the number of premium and elite tickets combined. It means that

x = 3(y + z)

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3y + 3z + y + z = 440

4y + 4z = 440- - - - - - - - - - - - -3

5(3y + 3z) + 15y + 25z = 3940

15y + 15z + 15y + 25z = 3940

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Multiplying equation 3 by 10 and equation 4 by 1, it becomes

40y + 40z = 4400

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