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sesenic [268]
3 years ago
9

F(x) = 4 - 2x – 2x3 g(x) = x² + 7x-9 Find f(x) + g(x).

Mathematics
1 answer:
Orlov [11]3 years ago
3 0

Answer:

-2x^3+x^2+5x-5

Step-by-step explanation:

f(x) = 4 - 2x – 2x^3

g(x) = x² + 7x-9

f(x) + g(x)=4 - 2x – 2x^3+ x² + 7x-9

Combine like  terms

f(x) + g(x) = -2x^3+x^2+5x-5

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Eric wants to get an output of 0. Can he do this with each machine? If so, how? If not, why not?
natita [175]

Answer:

  • <u>No, he can get an output of 0 with the second machine (function B) but he cannot get an output of 0 with the first machine (function A).</u>

Explanation

The way each machine works is given by the expression (function) inside it.

<u>1)  </u><em><u>Function A</u></em>

To get an output of 0 with the function y = x² + 3, you must solve the equation x² + 3 = 0.

Since x² is zero or positive for any real number, x² + 3 will never be less than 3 (the minimum value of x² + 3 is 3). So, it is not possible to get an output of 0 with the first machine.

<u>2) </u><em><u>Function B</u></em>

Solve y=\sqrt{x}-2=0

  • \sqrt{x}-2=0

  • \sqrt{x} =2

  • x=2^{2}

  • x=4

So, he can get an output of 0 by using x = 4.

4 0
2 years ago
How do you write an equation for (-5,-1), (0,-1)
lesya692 [45]
Both the points have a coordinate where y is -1, so the equation is simply -1

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however if you wanted to really show the working out, it looks like this:

y=mx+c

m=change in y/change in x

m=(-1-1)/(-5+0)=0

subsitute one of the coordinates into y=mx+c

-1=0+c

c=-1

so then y=-1



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daser333 [38]
Well, difference means subtractions so we need to subtract 2 and c

2-c
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jeyben [28]
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Mashutka [201]

Answer: 0.06, 6/100, 3/50

Step-by-step explanation:

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