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3 years ago

How do u solve 1×-2y=4 -1×+10y=8

Mathematics

1 answer:

Molodets [167]3 years ago

6 0

Answer: x = -8 ; y = -6

Step-by-step explanation:

1*x-2*y=4

1*x = 4 + 2*y

x = 4 + 2*y

Now you replace the value of x on the following equation:

-1*x+10*y=8

-1*(4 + 2*y) = 8

-4 - 2*y = 8

-2*y = 8+4

-2*y = 12

y = -12/2

y = -6

You replace the value of y in the previous equation:

x = 4 + 2*y

x = 4 + 2*(-6)

x = 4 - 12

x = -8

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Answer:

a) correct option is

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Step-by-step explanation:

Given data:

mean number is given as 6.2

correct option is

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2 years ago

The scale on a map is 1 cm: 7 km. If two cities are 15 cm apart on the map, what is the actual distance between the cities?

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Answer: C. 105 km

Step-by-step explanation:

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