The ratio of male students to female students is 4 to 5. if there is a total of 6192 students, find the number of male syudents
1 answer:
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(x + 9)(x + 12) = 0
Expanding the brackets, we get:
Expanding the brackets, we get:
Remark
The only points that can lie on the y axis are a and d. There has to be a zero someplace. But the question is where?
The answer is in the graph below. (0,6) is in red and it is on the y axis.
(6,0) is blue and is on the x axis.
So if you want a point to lie on the y axis, the answer is that the x part of the point must be 0.
Answer D
