74.5 minutes
Turn every fraction denominator to 60 since those are minutes
5. 14.5
- ×7.5= -----
8. 60
1/2 × 30= 30/60
2/5×12= 12/60
3/10×6= 18/60
Add all of the numerators together for the total number of minuted
7n^2 + 5 = 453
Subtract 5 from both sides:
7n^2 = 448
Divide both sides by 7:
N^2 = 64
Take the square root of both sides:
N = 8
Answer:
6.57 and1.11 is the answer to the question
If you look at any graph, you'll notice that at the point where the graph crosses
the y-axis, the x-value of the graph is <em><u>zero</u></em>. Does that give you any ideas ?
Just take the equation, call 'x' zero, then solve whatever is left for 'y'.
