Which expression represents a number that is four times as large as the sum of 8 and 160?
1 answer:
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Given that,
Speed of first bicycle = 9 mph
Speed of second bicycle = 5 mph
Suppose the length of the circle 24 miles.
We need to find the relative velocity
Using formula of relative velocity
Put the value into the formula
We need to calculate the time
Using formula of time
We need to calculate the distance of the points where the two bicycles meet
Using formula of distance
For first bicycles,
For second bicycles,
Hence, The points where the two bicycles meet after every 6hr at 30 miles and 54 miles.
Answer:
D. 13
Step-by-step explanation:
You can do the product in the straight-forward way ...
... (3 -2i)(3 +2i) = 3·3 +3·2i -3i·3 -(2i)(2i)
... = 9 +6i -6i -4i² . . . . . note the middle two terms cancel
Recognize that i = √-1, so i² = -1. Then the sum is
... = 9 -4(-1) = 9+4 = 13
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Your graphing calculator can do this product, too.
