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NeTakaya
3 years ago
8

One hamburger and one coke cost $3.20. Three hamburgers and one coke cost $8.00. Find the cost of one hamburger.

Mathematics
2 answers:
Varvara68 [4.7K]3 years ago
5 0

Answer:

$0.80

Step-by-step explanation:

-3 (1x + 1y = 3.2)

3x + 1y = 8

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

-3x - 3y = -9.6

+

3x + 1 y = 8

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

0x -2y = -1.6

÷ -2

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

y = 0.8

one hamburger costs $0.80

Nikitich [7]3 years ago
3 0
I'm pretty sure it's A
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===========================================================

Work Shown:

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3 years ago
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A young sumo wrestler decided to go on a special diet to gain weight rapidly. He gained weight at a constant rate.
Fittoniya [83]

The wrestler gained 5.20 kilograms per month.

Step-by-step explanation:

Let,

x be the weight gained every month.

y be the original weight before weight gain.

According to given statement;

0.5x+y=80.6   Eqn 1

2x+y=88.4    Eqn 2

3.5x+y=96.2    Eqn 3

Subtracting Eqn 1 from Eqn 2

(2x+y)-(0.5x+y)=88.4-80.6\\2x+y-0.5x-y=7.8\\1.5x=7.8

Dividing both sides by 1.5

\frac{1.5x}{1.5}=\frac{7.8}{1.5}\\x=5.20

The wrestler gained 5.20 kilograms per month.

Keywords: linear equation, subtraction

Learn more about linear equations at:

  • brainly.com/question/4459688
  • brainly.com/question/4460262

#LearnwithBrainly

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