The McCalls insured their house for 90% of it's value. If the house is valued at $84,000, how much is it insured for?

2 answers:

8 0

The question is just asking for 90% of 84,000. To do this, you can change 90% into decimal by moving the decimal 2 place over which gives .90

After that, you multiply .90 by 84,000 which is $75,600

Another way to do this is to convert 90% to a fraction. To do that, you would put 90/100 which can simplify to 9/10. Then you would multiply that by 84,000. 1 of the 0's can cancel, so you are left with 9x8,400 which gives the same answer

noname [10]3 years ago

6 0

84000 * 0.90 (equivalent to 90%) = $75600

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Two buses leave a station at the same time and travel in opposite directions. One bus travels 15 /kmh faster than the other. If

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Since the buses travel in opposite directions, the speed at which they distance themselves is the sum of their speeds.
One bus travels at speed s.
The other bus travels at speed s + 15.
The sum of the speeds is s + s + 15 = 2s + 15

speed = distance/time

distance = speed * time

366 = (2s + 15) * 2

183 = 2s + 15

168 = 2s

s = 84

The slower bus travels at 84 km/h.

s + 15 = 84 + 15 = 99

The faster bus travels at 99 km/h.

Check:
In 2 hours, the slower bus travels 2 * 84 km = 168 km
In 2 hours, the faster bus travels 2 * 99 km = 198 km
In 2 hours, the buses are 198 km + 168 km = 366 km apart.
Our answer is correct.

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