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yulyashka [42]
3 years ago
5

F(x)=2x+3 find x=9 explain how you got the answer please help me I need the answer today

Mathematics
1 answer:
hram777 [196]3 years ago
6 0
You would fill in 9 for x so your equation would be 2(9)+3 and you would then get 21. Therefore the answer is f(x)=21
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Find the solution to the following system using substitution or elimination: y = 3x + 2 y = -2x - 8 O A. (-5,-) OB. (-2,-4) O C.
mr Goodwill [35]

Answer:

B. (-2,-4)

Explanation

Given equations:

   y = 3x + 2

   y = -2x - 8

Solving both equations will yield the values of x and y;

Solution:

   y = 3x + 2    ----- (i)

   y = -2x - 8   ------ (ii)

Using substitution method, input equation i, into ii

    3x + 2 = -2x - 8

Collect like terms and solve;

     3x + 2x = -8 -2

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            x  = -2

Then put x = -2 into i, to find y

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So, the solution of the equation is B. (-2,-4)

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