What is the solution set for −4 x + 10 ≥ 5 x + 55?
1 answer:
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Answer:
A)
B)
C) d=200-7t
D) t=28.57s
Step-by-step explanation:
A) in order to solve this part of the problem, we must remember that velocity is the ratio between a displacement and the time it takes for a body to go from one point to the other. So we can write it like this:
when solvin for the distance x, we get the formula to be:
We can use this to write the expression they are asking us for, so we get:
B) the procedure for part b is the same as the procedure for par A with the difference that Carolyn's speed is different. So by using the same formula with Carolyn's speed we get:
C)
In order to find the distance between Ian and Carolyn, we subtract the distances found on the previous two questions from the 200ft, so we get:
we can further substitute the d's with the equations we found on the previos two parts of the problem, so we get:
which simplififfes to the following:
d=200-7t
D) we can figure the seconds out by substituing the distance for 0 and solving for t, so we get:
0=200-7t
which can be solved for t, lke this:
-7t=-200
Answer:
1.57 units
Step-by-step explanation:
The formula for arc length is given as:
Arc Length =
Now,
- Arc length of BD =
- Arc length of CE =
The difference in CE and BD is
Second answer choice is right.
***** <u><em>CE falls in the larger circle whose radius is AB + BC = 6+2=8</em></u>
<u><em>BD falls in the smaller circle whose radius is AB=6</em></u>