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3 years ago

I need x+y=5 and y=2x-4solved algebraically

Mathematics

2 answers:

ipn [44]3 years ago

7 0

X=3, y=2 solved algebraicly

schepotkina [342]3 years ago

4 0

Answer:

x = 3; y = 2

Step-by-step explanation:

x + y = 5

y = 2x - 4

Isolate the y in the first equation

y = 5 - x

y = 2x - 4

Substitute the values

5 - x = 2x - 4

Isolate the Variable

9 = 3x

Simplify

3 = x

Plug that into the first equation

3 + y = 5

Subtract 3 from both sides

y = 2

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3 years ago

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3 years ago

One of the main contaminants of a nuclear accident, such as that at Chernobyl, is strontium-90, which decays exponentially at a

igor_vitrenko [27]

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Step-by-step explanation:

We know that the general form of the exponential decay formula is

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Hence, the ratio of remaining since the nuclear accident is $P=0.975^t$

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3 years ago

Read 2 more answers

What is the slope of the line passing through the following points (-2,5) & (1,-7)?

igor_vitrenko [27]

Answer:

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Step-by-step explanation:

The formula to get slope is m=y1-y2 and x1-x2

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7 0

2 years ago