An accounting machine operator wanted to divide an 85-minute job between two identical machines so that one machine would take o
ne and a half times as long as the other. how much time (in minutes) was taken by the machine doing the longer job?
1 answer:
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Given:
A quadratic function has a line of symmetry at x = –3.5 and a zero at –9.
To find:
The other zero.
Solution:
We know that, the line of symmetry divides the graph of quadratic function in two congruent parts. So, both zeroes are equidistant from the line of symmetry.
It means, line of symmetry passes through the mid point of both zeroes.
Let the other zero be x.
Multiply both sides by 2.
Add 9 on both sides.
Therefore, the other zero of the quadratic function is 2.