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Elanso [62]
3 years ago
5

Two computer disks and three notebooks cost $17. However,

Mathematics
1 answer:
zhuklara [117]3 years ago
3 0

Answer:

Computer disks are $4 each

Notebooks are $3 each

Step-by-step explanation:

For the first equation

<em>$4 x 2 disks = $8</em>

<em>$3 x 3 notebooks = $9</em>

<em>$9 + $8 = </em>$17

For the second equation

<em>$4 x 5 disks = $20</em>

<em>$3 x 4 notebooks = $12</em>

<em>$20 + $12 = </em>$32

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Use the scale of 1cm=45 km
alex41 [277]

Answer:

d = 7.4 cm is the distance between the two cities on the map.

Step-by-step explanation:

Let d = the distance measured on the map in centimeters (cm) between any two locations and let D be the actual distance in kilometers (km) between these same two locations.

Since the scale on the map is 1 cm = 45 km, then the ratio of the distance on the map to the actual distance is equal to 1cm/45 km; therefore the quotient of any measured distance d on the map divided by the corresponding much longer actual distance D would have to maintain (equal) this same ratio; In other words, we can set up the following proportion to solve for d given the actual distance D = 333 km as follows:

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Check:

1 cm/45 cm = d/333 km

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