Solve by elimination. 1. 2x-3y=-9. 4x+9y=-13. 2. 2x-y=7 4x+5y=7. 3. 2x+4y=14 4x+y=14. 4. 4x-3y=16 5x+17y=20
1 answer:
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Given:
On a map to cities are about 50 mm apart.
Scale is 1 cm equals 15.5 miles.
To find:
The distance between two cities.
Step-by-step explanation:
We have,
1 cm = 15.5 miles
It means
10 mm = 15.5 miles [1 cm = 10 mm]
Now,
10 mm on a map = 15.5 miles
1 mm on a map = miles
= 1.55 miles
50 mm on a map = 50 × 1.55 miles
= 77.5
Therefore, the two cities are 77.5 miles apart.