Answer:
7/20=0.35
-23/20=1.15
1/18=0.5 (5 repeating)
-60/22=-2.72 (72 repeating)
Find price per inch:
0.52 / 13 = 0.04 per inch.
Multiply cost per inch by inches:
0.04 x 34 = 1.36
It will cost $1.36 for 34 inches.
Set up the proportion. That's what similar gives you the right to do.
(12 + 3) / 4x = 12 / (3x + 1) Cross multiply
15 * (3x + 1) = 12 * 4x Remove the brackets
45x + 15 = 48x Subtract 45x from both sides.
15 = 48x - 45x
15 = 3x
x = 5
A 10-inch candle burns at a constant rate of 1 inch per hour.
Rule in words: To determine the height of the candle multiply the number of
hours that the candle burns by 1 inch per hour, and subtract the product from
the candle’s initial height (10 inches).
Rule in Equation: If y represents the height of the candle after x hours of
burning, then the relationship can be expressed as an equation in the form y
= mx + b, where m represents the rate at which the candle burns (1 inch per
hour) and b represents the initial height of the candle (10 inches).
Height of Candle = Rate at which it Burns • Number of Hours Burned +
Initial Height
y = -1 • x + 10, or y = 10 -1x