Multiplying and dividing both have the same rules for determining the sign
two negatives leads to a positive
one negative and one positive leads to a negative
two positives lead to a positive
Step-by-step explanation:
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Answer: 55mi/hr
Step-by-step explanation:
220 mi/4 hrs= 55mi/hr
Answer:
≈ 397 m
Step-by-step explanation:
Using Pythagoras' identity on the right triangle
The square on the hypotenuse is equal to the sum of the squares on the other 2 sides.
Let h represent the height of the balloon above ground, then
h² + 50² = 400², that is
h² + 2500 = 160000 ( subtract 2500 from both sides )
h² = 157500 ( take the square root of both sides )
h ≈ 397 m ( to the nearest metre )
Answer:
It took him 6.75 hours
or 6 hours and 45 minutes
Step-by-step explanation:
The first two hours he travels
50 mi/h *2 h = 100 mi
then a 15 min break
then 2 more hours
50 mi/h *2 h = 100 mi
then a 30 min break
then 2 more hours
50 mi/h *2 h = 100 mi
