77 rice balls. You can do this problem in 2 ways set up a proportion and solve for x or get the amount of grams needed to make 1 rice ball (100100/11) 9100g per rice ball and then you divide what you have 700700 by 9100 to get 77.
Solution
Let take boat speed = x
Current speed = 4
Upstream = x - 4
Downstream = x + 4
Distance = 9
Time upstream + Time downstream = 10
Time = Distance/Speed
9/(x + 4) + 9/(x - 4) = 10
Solving this equation 9(x-4)+9(x+4) = 10(x^2 -16)
9x - 36 + 9x + 36 = 10x^2 - 160
18x = 10x^2 -160
10x^2 -18x - 160 = 0
Now solving the above quadratic equation, we get
x = 5 or x = -16/5
We ignore the negative value.
The answer is 5.
The speed of the boat in still water is 5mph.
Thank you.
Answer:
17
Step-by-step explanation:
56 / (7/8) =
56 * 8/7 =
448/7 =
64.......so there are 64 total paperclips
64 * 0.03 = $ 1.92 <=== to get a total of 56 inches, u would have to use 64 paper clips costing u $ 1.92