Ricky needs 3 1/4 cups of sugar to make candy. He already has 2 1/2 cups. How many more cups of sugar does he need?
1 answer:
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Hi there!
2x - 4y = 9
Begin by isolating the y variable by moving 2x to the right-hand side of the equation. (Subtract 2x from both sides):
2x - 2x - 4y = 9 - 2x
-4y = 9 - 2x
Further isolate by dividing both sides by -4:
-4y / (-4) = (9 - 2x) / (-4)
y = -9/4 - 2x/(-4)
Simplify further:
y = -9/4 + 1/2x
y = 1/2x - 9/4
The "b" value is the y-intercept, therefore:
x = 0 at y = -9/4
<span><u><em>The correct answer is: </em></u>
4.
<u><em>Explanation</em></u><span><u><em>: </em></u>
To find this answer, we divide the number of windows, 50, by the length (in windows covered) of each covering, 15:
</span></span>
<span><span>.
This means that 3 coverings won't quite be long enough, so we will need 4. </span></span>
4.
<u><em>Explanation</em></u><span><u><em>: </em></u>
To find this answer, we divide the number of windows, 50, by the length (in windows covered) of each covering, 15:
</span></span>
This means that 3 coverings won't quite be long enough, so we will need 4. </span></span>