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olga55 [171]
2 years ago
15

4

Mathematics
1 answer:
ira [324]2 years ago
7 0

Answer:

4. x = 11

5. x = -13

Step-by-step explanation:

4.   3x + 7 = 5x - 15

           -7           -7

3x = 5x - 22

-5x   -5x

-2x = -22

-2x/-2 = -22/-2

x = 11

5. 3(2x - 5) = 9x + 24

6x - 15 = 9x + 24

    +15          +15

6x = 9x + 39

-9x   -9x

-3x = 39

-3x/-3 = 39/-3

x = -13

Hope this helps, have a great day:)

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The farmer looks out in the barnyard and Cesar pigs and the chickens. He says to his daughter, “ I count 40 heads in 100 feet. H
notsponge [240]

Answer:

There are  10 pigs and 30 chickens

Step-by-step explanation:

Let the number of pigs be x

let the number of chickens be y

Then there are 40 heads . So the total number of pigs and chickens is 40

x + y = 40-----------------------(1)

We know that pigs have 4 legs and chickens have 2 legs

4x + 2y = 100----------------------(2)

Solving (1) and (2)

multiply  (1) by 2

2x + 2y = 80-------------------------(3)

subtract (3) from (2)

4x + 2y = 100

2x + 2y = 80

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x = \frac{20}{2}

x = 10

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7 0
3 years ago
Not sure of this one. can an.expert help
kifflom [539]

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6 0
3 years ago
Rita offers to pay for 8 of her friends to play lazer tag, but 3 of them dont want to pay
Mrac [35]

Answer:

only 5 of her friends will play

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Answer:

Step-by-step explanation:

3000   600

5000   1000

6000   1200

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7 0
2 years ago
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RUDIKE [14]

Answer:

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Step-by-step explanation:

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3 years ago
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