Answer:
0=0
Step-by-step explanation:
Well, the linear equation can be expressed as y=ax+b in the solution of linear equations, there 3 main cases can be concluded as final lines. 1st case - the linear equation has no solution (for example, 0*x=5 has no solutions). 2nd case - the linear equation has one solution (for example 4*x=3 where the only one solution is x=0.75) and the 3rd case - the linear equation has infinite number of solutions (for example 0*x=0). So, in our case (3rd case) the last line can be concluded as 0=0.
You are implying that 2x- 9=31
Add 9:
2x=40
Divided by :2
x=20
therefore I thing the number is 20
The string would have to be 4 feet long to have a frequency of 400cps because each foot=100cps
Answer:
x=80
Step-by-step explanation:
39₂+b₂=89₂
1521+b₂=7921
7921-1521=6400
=80
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