You would need to explain base ten and base 8
Answer:
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tjhStep-by-step explanation:
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Sum of {(-5i + 2) from i = 1 to 10} =
= - 5{ (Sum i) from 1 to 10} + (sum of 2) from 1 to 10
= - 5 {1 + 10)*10/2} + 2{10} =
= -5(11)(5) + 20 = -275 + 20 = - 255
Answer:
Average speed
= 5 5/6 mph , or
= 5.83 mph (to 2 decimals)
Step-by-step explanation:
Average speed is total distance divided by the total time it takes to cover the given distance.
Since uphill = 5 mph, and downhill = 7 mph, we know the average speed is between 5 and 7 mph.
Let
x = distance uphill, and also distance downhill.
Total distance = 2x miles
Total time = x/5 + x/7 hours = 12x/35 hours
Average speed
= total distance/total time
= 2x / (12x/35) mph
= 70x / 12x
= 5 5/6 mph
= 5.83 mph (to 2 decimals)
Triangle abc i guess
I don't rlly understand what you mean
