Answer:
Matt's Answer.
Step-by-step explanation:
Note that in the equation, you need a radius (r). However, a <em>diameter is given, which is 15 centimeters</em>. This means that, to solve this equation, you must first divide 15 by 2, to be able to continue to solve. In Matt's case, he failed to do that.
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Answer:
2x(5x +1)=3
Step-by-step explanation:
2x(5x + 1) = 3
3 is the answer because 2x-5x=3 and 3*1=3
For this case, what we can do is calculate an average of the time it takes to fill the tank for both pipes.
We have then:
taver = (tA + tB) / (2)
Where,
taver: average time (both pipes)
tA: time it takes the pipe A
tB: time taken by pipe B
Substituting the values:
9.9 = (18 + tB) / (2)
Clear tB:
tB = (2 * (9.9)) - 18
tB = 1.8 hours
Answer:
it takes pipe B, running alone, to fill the tank about 1.8 hours