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Dominik [7]
3 years ago
15

Pls help asap !!! if f(x) = 3/5x and g(x) = -3x/2, find f(x) + g(x)

Mathematics
1 answer:
liq [111]3 years ago
5 0
To calculate f(x) + g(x)
=3/5x + (-3x/2)
=3/5x - 3x/2
=2(3)/2(5x)-(5x)(3x)/(5x)(2)
=(6/10x-15x^2)/10x
=(15x^2-6)/-10x
Thus the answer is D

hope it helps!

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4 years ago
6.81 is what percent of 45.5
frosja888 [35]

To get the solution, we are looking for, we need to point out what we know.

1. We assume, that the number 45.5 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 45.5 is 100%, so we can write it down as 45.5=100%.

4. We know, that x is 6.81% of the output value, so we can write it down as x=6.81%.

5. Now we have two simple equations:

1) 45.5=100%

2) x=6.81%

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

45.5/x=100%/6.81%

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.


7. Solution for what is 6.81% of 45.5


45.5/x=100/6.81

(45.5/x)*x=(100/6.81)*x       - we multiply both sides of the equation by x

45.5=14.684287812041*x       - we divide both sides of the equation by (14.684287812041) to get x

45.5/14.684287812041=x

3.09855=x

x=3.09855

now we have:

6.81% of 45.5=3.09855

Hope this helps!

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Now swap sides to make it prettier:

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