Burros are amphibians, true or false?
1 answer:
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Answer: Sue spends travelling 3.5 hours and spends stationary 2.5 hours
Step-by-step explanation:
The attached image shows Sue's distance-time graph, from there we can observe the segments where she is stationary (lines with no slope) and the segments where she is travelling (lines with slope).
<u>Time spent travelling:</u>
From 2 p.m. to 3 p.m. is 1 hour
From 3:30 p.m. to 4 p.m. is 0.5 hour
From 5 p.m. to 6:30 p.m. is 1.5 hours
From 7:30 p.m. to 8 p.m. is 0.5 hour
Total time travelling=1 h+0.5 h+1.5h+0.5h=3.5 h
<u>Time spent stationary:</u>
From 3 p.m. to 3:30 p.m. is 0.5 hour
From 4 p.m. to 5 p.m. is 1 hour
From 6:30 p.m. to 7:30 p.m. is 1 hour
Total time travelling=0.5 h+1 h+1h=2.5 h
Answer:
3x³ - 8x² - 7x + 12
Step-by-step explanation:
We multiply these terms, (so expand the brackets). Referring to the diagram attached, we multiply the first terms, outer terms, inner terms, and last terms.
Let's first look at the first two (we will do something about the third brackets later):
(3x+4)(x-1)
Firsts:
3x²
Outer:
-3x
Inner:
4x
Last:
-4
Now we combine:
3x² - 3x + 4x - 4
= 3x² + x - 4
So from the whole equation, we now have this:
(3x² + x - 4)(x - 3)
We do a similar thing here.
3x³ - 9x² + x² - 3x - 4x + 12
Simplify:
3x³ - 8x² - 7x + 12
