Answer:256,384,640
Step-by-step explanation:
Take the ration sum 2x+3x+5x=1280
When we add we get 10x=1280
Then find x by. x=1280/10=128
Then substitute this x value to the ratios 2x=2*128 =256
3x=3*128=384
5x=5*128=640
The answer is 7√3 and I'll tell you why
So the first step is to break down these big numbers to find a commen number like this:
√75= 5√3
√12= 2√3
Next you will just simply add the similar elements together:
5√3 + 2√3
5+2= 7
and so 7√3 is the correct answer
Answer: C: pi/6 and 11pi/6 only
Step-by-step explanation:
Edge2020 :]
Roberto overtakes Juanita at the rate of (7.7 mi)/(11 h) = 0.7 mi/h. This is the difference in their speeds. The sum of their speeds is (7.7 mi)/1 h) = 7.7 mi/h.
Roberto walks at the rate (7.7 + 0.7)/2 = 4.2 mi/h.
Juanita walks at the rate 4.2 - 0.7 = 3.5 mi/h.
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In a "sum and diference" problem, one solution is half the total of the sum and difference. If we let R and J be the respective speeds of Roberto and Juanita, we have
R + J = total speed
R - J = difference speed
Adding these two equations, we have
2R = (total speed + difference speed)
R = (total speed + difference speed)2 . . . . . as computed above
