Answer:
10.5
Step-by-step explanation:
Its a right triangle, and the units were on right there, so I found the perimeter of the square it would be, then divided it by 2, because 2 triangles make a square.
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(9+12)/2 = 10.5
She can drive 558 miles with 18 gallons of fuel.
Step-by-step explanation:
Given,
Distance traveled with 5 gallons = 155 miles
Distance traveled with 1 gallon = 
Total fuel hold by tank = 18 gallons
Total distance = Distance traveled with 1 gallon * Total fuel hold by tank
Total distance = 
Total distance = 558 miles
She can drive 558 miles with 18 gallons of fuel.
Keywords: multiplication, unit rate
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If a colored printer prints 23 pages in 12 minutes it would take about 1.91 minutes per page.
Answer:
No solution.
Step-by-step explanation:

If the final answer is 0 and both sides of this equation are unbalanced, that means there will be no solution.