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14.11.2019 •
Mathematics
)consider the following pair of equations: y = −2x + 8 y = x − 1 explain how you will solve the pair of equations by substitution. show all the steps and write the solution in (x, y) form.
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Ответ:
Hi there,
Take y from first equation and use it / substitute it into the second equation:
-2x + 8 = x - 1, so 3x = 9, therefore x = 3.
Then y = x - 1 = 3 - 1 => y = 2.
Solution is (3,2).
A quick check: 2 = -2*3 + 8, true, and 3 = 2 - 1, also true.
Green eyes.
Ответ:
The angles c and b are both 15 degrees.
Step-by-step explanation: