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inna [77]
3 years ago
5

7x+2y=19 7x+8y=13 Please solve it by Simultaneous method

Mathematics
1 answer:
elixir [45]3 years ago
4 0

Answer:

y=-1

x=3

Step-by-step explanation:

7x+2y=19-----(1)

7x+8y=13------(2)

(1)-(2)

(7x+2y)-(7x+8y)=19-13

7x+2y-7x-8y=6

+2y-8y=6

-6y=6

y=-1

by substitute in (1)

7x+2*(-1)=19

7x-2=19

7x=19+2

7x=21

x=21/3

x=3

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Answer: 480 milligrams

Step-by-step explanation:

We can solve this by using direct proportion whereby y = kx

where,

x = patient's weight = 92 pounds

k = constant

y = milligrams of antibiotics = 320

Using y = kx

320 = 92k

k = 320/92

k = 3.4782609

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3 years ago
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of the 35 largest cities in a country, 4 are located in state A. If state A has twice as many large cities as state B, how many
Hunter-Best [27]

State A has 4/35 of the largest cities in the country.

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This means State B has 2/35 of the largest cities in the country.

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3 years ago
What is the measure of 3?
mafiozo [28]

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Since g and h are parallel lines then

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Answer:

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I hope I helped! Have a great rest of your day.

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