yarializbeth yarializbeth

27-03-2021
Mathematics

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If x = 3 solves the system shown below , what must be the value of a? y = 5x - 8 y = ax + 19

If x 3 solves the system shown below what must be the value of a y 5x 8 y ax 19 class=

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RedPandas RedPandas

27-03-2021

Answer:

a = -4

Step-by-step explanation:

Plug in 3 for x to solve y = 5x -8 (it equals 7).

Then plug in 7 for y in the next equation y = ax + 19.

This leads to 7 = 3a + 19.

Then you simplify the equation using PEMDAS or BODMAS (UK version).

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