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romanna [79]
3 years ago
12

Solve the following exponential growth function for y when x=5. round to the nearest tenth

Mathematics
1 answer:
OlgaM077 [116]3 years ago
4 0

Here the given expression is

y =1.5^x

And the given value of x=5 . We need to find the value of y when x=5. And for that, we need to plug 5 for x .

y=1.5^5 =7.6

So when x=5, y= 7.6

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<em>Comment on linear combination</em>

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In the worst case, you can combine ...

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  • dx +ey = f

by multiplying the second equation by <em>a</em> and the first by <em>-d</em>:

  a(dx +ey) -d(ax +by) = a( f) -d(c)

  y(ae -bd) = fa -cd . . . . . . simplify; x is eliminated

This sort of approach results in a formula for the solution known as Cramer's Rule.

  y = (fa-cd)/(ae-bd)

The corresponding solution for x is ...

  x = (ce-bf)/(ae-bd)

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The point of looking at the equations first is that you can often choose which variable to eliminate and what multiplier to use to minimize the amount of arithmetic involved—as we did above.

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