Twice once number added to another number is 18. If the second number is equal to 12 less than 4 times the first number, find the first two numbers. 2x+y= 12 ; y= __x - __

I really need help with the second part...

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Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is . reset next

Identify the parent function that can be used to graph the function f(x)=3(x-9)2