Purchasing a couch that is 20% off will save $140. What is the original price of the couch?
2 answers:
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Answer:
<h2>y - 5 = x - 20</h2>Step-by-step explanation:
The equation of a linear function in
slope-intercept form:
point-slope form:
standard form:
general form:
1.
y(x - 1) = 9
xy - y = 9 NO
2.
y - 5 = x(-x + 2)
y - 5 = -x² + 2x NO
3.
y(y - 1) = x + 25
y² - y = x + 25 NO
4.
y - 5 = x - 20
y - 5 = 1(x - 20) YES <em>(it's a point-slope form)</em>
Answer:
Step-by-step explanation:
Since f(x) and g(x) share the same top at (0,0), their difference is only a scale factor, so g(x) = ax² but we need to find a.
To find it, we use the given point of g, (2,1)
So g(2) = 1
meaning that
a·2² = 1
4a = 1
a = 1/4