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jasenka [17]
3 years ago
5

Find the value of 9x + 4y, when x = 4 and y = -3.

Mathematics
2 answers:
drek231 [11]3 years ago
6 0
24
9x4+4x-3
36+-12=24
answer=24
NARA [144]3 years ago
3 0

Answer:

hope found the answers bye.

Step-by-step explanation:

9x + 4y - 4  =  0     

Putting in the x-value of -1, we get:

9(-1) + 4y - 4  =  0

Simplifying:

-9 + 4y - 4  =  0

Combining the -9 and the -4:

4y - 13  =  0

Getting rid of the -13 by adding 13 to both sides:

4y - 13 + 13  =  0 + 13

4y  = 13

Dividing both sides by 4:

y = 13/4

Checking:  Is 9(-1) +4(13/4) -4  really zero?    Yes!

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