Question

Nathaniel can weld a railing in 75 minutes. Brenda can weld a railing 25 minutes faster. If they work together, how many minutes does it take them to weld the railing?

Answer 1

\[N=\frac{1}{75} per \space \min\\B=\frac{1}{75-25}per \space \min\\N+B =\frac{1}{75}+\frac{1}{50}\\final \space answer =\frac{1}{\frac{1}{75}+\frac{1}{50}}\]

Answer 2

So what is the answer if the choices are
25 minutes
30 minutes
50 minutes
150 minutes

Answer 3

1/75+1/50=1/30
so ...?

Answer 4

150 is the cd...sooo hold on

Answer 5

I got 5/5....

Answer 6

:/

Answer 7

50

Answer 8

\[\frac{1}{75}+\frac{1}{50}=\frac{1}{25}(\frac{1}{3}+\frac{1}{2})=\frac{1}{30}\\\frac{1}{\frac{1}{75}+\frac{1}{50}}=\frac{1}{\frac{1}{30}}=30\]

Answer 9

Am I right?

Answer 10

yes