austinparness02
06.05.2020 •
Mathematics
The difference of the square of a number and 18 is equal to 3 times that number. Find
the positive solution.
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Ответ:
6.
Step-by-step explanation:
To solve this, you can set up an equation as such:
x²-18= 3x
Now, rearrange this to make it an equation in standard form:
x²-3x-18=0.
Simply turn this equation into factored form:
(x-6)(x+3)= 0.
The only positive solution here is x=6.
Ответ:
there are a total of 12 kids but 5 are girls so that means it is 7/12 or 7 out of 12.