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miss Akunina [59]
3 years ago
5

If f(x) = 5x + 40, what is f(x) when x = -5?

Mathematics
1 answer:
Makovka662 [10]3 years ago
6 0

Answer:

f(-5) = 15

Step-by-step explanation:

f(x)=5x+40

plug in x as -5

f(-5) = 5(-5) + 40

multiply 5 by -5

-25+40

add -25 to 40

15

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If 12 x 2 is 24, 12 x 3 is 36, 12 x 4 is 48, then what is 12 x 12?
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Answer:

12 x 12 is 144

Step-by-step explanation:

All you have to do is keep adding 12 each time :)

6 0
3 years ago
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(3x²+3x+5)+(7x²-9x=8)=10x²-12x=13
Brilliant_brown [7]

The value of x is equal to -5/6

To solve this question, we have to add two polynomials together. The polynomials are;

  • 3x^2+3x+5
  • 7x^2-9x=8
<h3>Addition of Polynomials</h3>

This involves adding of two or more different polynomials together. The polynomials adding together are or must be of the same degree. i.e x^2 must add to another coefficient of x^2 and x^3 adds to another coefficient of x^3 and so on.

In this given question, let's add the polynomials together.

(3x^2+3x+5) + (7x^2-9x = 8\)\\3x^2 + 7x^2 + 3x-9x+5-8 =10x^2-6x-3

Now, let's equate this with the last polynomial given

10x^2-6x-3=10x^2-12x-13\\10x^2-10x^2-6x+12x-3+13\\0+12x+10\\12x=-10

Let's solve for x

12x=-10\\x=-\frac{10}{12}\\x = -\frac{5}{6}

The value of x is equal to -5/6

Learn more on addition of polynomials here;

brainly.com/question/4142886

8 0
2 years ago
Help me show work please
skad [1K]
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Answer:

red and green

Step-by-step explanation:

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A. 8 cats per week. if you simplify 40/5, it equals 8/1
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