Answer:
3.2 cm
Step-by-step explanation:
If we know that our ratio is 4 cm: 5 km. We can find the unit rate of the scale. Which would be 0.8 cm: 1 km. After we find the unit ratio we can then multiply both sides by 4. (4 * 0.8) : (4*1) After simplifying we get the ratio of 3.2cm: 4 km.
x=2, y=16
x+y=18
y=8x
x+8x=18
x=2
y=16
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