Answer:
Step-by-step explanation:
How do you determine which variable to substitute in for?
1 answer:
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Answer:
a = - 100
Step-by-step explanation:
Given
= - 10
Multiply both sides by 10 to clear the fraction
a = 10 × - 10 = - 100
Answer:
y = 3x + 23 and
Step-by-step explanation:
The first equation is 9x - 3y = - 69 and we have to write it in slope-intercept form.
Now, 9x - 3y = - 69
⇒ 3x - y = - 23 {Dividing both sides by 3}
⇒ 3x + 23 = y
⇒ y = 3x + 23 {Interchanging the sides} (Answer)
The second equation is x - 3y = - 6 and we have to write it in slope-intercept form.
Now, x - 3y = - 6
⇒ x + 6 = 3y
⇒ 3y = x + 6 {Interchanging the sides}
⇒ {Dividing both sides by 3}
⇒ (Answer)