A hobby store prices model train track using a proportional relationship between the length of track (in inches) and the cost in
dollars.
If 6.4
6
.
4
inches of track costs $16
$
16
, what is the constant of proportionality?
If 6.4
6
.
4
inches of track costs $16
$
16
, what is the constant of proportionality?
2 answers:
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Use the formula for the area of a parallelogram:
Plug in what we know:
Convert both of them into improper fractions. We do this by multiplying the denominator to the whole number, adding it to the numerator, which becomes our new numerator, and we keep the denominator the same:
Now multiply the numerators and denominators together:
Convert it back into a mixed number. 14 goes into 555 thirty-nine times. 14 * 39 = 546. 555 - 546 = 9. So we have 39 wholes and 9 left over, or:
So this is the area of the parallelogram.
Plug in what we know:
Convert both of them into improper fractions. We do this by multiplying the denominator to the whole number, adding it to the numerator, which becomes our new numerator, and we keep the denominator the same:
Now multiply the numerators and denominators together:
Convert it back into a mixed number. 14 goes into 555 thirty-nine times. 14 * 39 = 546. 555 - 546 = 9. So we have 39 wholes and 9 left over, or:
So this is the area of the parallelogram.