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2 years ago

Solve the system. 4x−y=−3y=5x

Mathematics

1 answer:

alina1380 [7]2 years ago

6 0

Answer:

4x - y = -3y = 5x

Write as a system

4x-y = 5x

-3y = 5x

Simplify the expressions

-x-y = 0

-5x-3y = 0

Multiply both sided by -5

5x + 5y = 0

-5x - 3y = 0

2y = 0

y = 0

Substitute the value of y into the equation

-x-0= 0

x=0

A possible solution is (x,y) = (0,0)

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Element X is a radioactive isotope such that its mass decreases by 26% every day. If an experiment starts out with 810 grams of

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Answer:

The hourly decay rate is of 1.25%, so the hourly rate of change is of -1.25%.

The function to represent the mass of the sample after t days is $A(t) = 810(0.74)^t$

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The hourly decay rate is of 1.25%, so the hourly rate of change is of -1.25%.

Starts out with 810 grams of Element X

This means that $A(0) = 810$

Element X is a radioactive isotope such that its mass decreases by 26% every day.

This means that we use, for this equation, r = 0.26.

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$A(t) = A(0)(1-r)^t$

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