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ExtremeBDS [4]
3 years ago
9

The distance between two cities is 145 miles. A truck can cover this distance in 2.5 hours. The speed of a car is 1.5 times fast

er than the speed of the truck. How long does it take them to meet, if they start moving towards each other simultaneously?
_hours
Mathematics
1 answer:
iren2701 [21]3 years ago
8 0
The truck can cover 145 miles in 2.5 hours, so the speed of the truck is 
145÷2.5=58 miles per hour
the car's speed is 1.5 times faster: 58×1.5=87 miles per hour
suppose in x hours they will meet:
distance covered by truck in x hour: 58x
distance covered by car in x hour: 87x
total distance: 145 miles
58x+87x=145
x=1
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The perimeter of the base of a regular quadrilateral prism is 60 cm, the area of a lateral face is 105 cm2. Find: the volume of
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Since the base is a regular quadrilateral, each of its 4 sides must have length
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Then the height of the prism is
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The area of the base is then
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The volume of the prism is the product of its base area and height.
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The volume is 1575 cm³.
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Byers Auto is selling a new minivan that has a base price of $22,510. The
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Curtis is twice as old as his brother Jonathan. Olivia is six years younger than Jonathan. The sum of their ages is 58 years.
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C=2 times j
c=2j
o=j-6
c+j+o=58

subsitte j-6 for o and 2j for c

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sub back


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olivia=10
jonathan=16

equations are
c+j+o=58
c=2j
o=j-6
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