Answer:
x + y = 11
10x + 5y = 80
Step-by-step explanation:
To complete the square you halve the coefficient of the x term and square it. Half of 14 is 7 and 7² is 49. So we add 49 and subtract 49, which means we are not changing the value of the quadratic. So we have x²+14x+49-49+2. This can be written: (x²+14x+49)-49+2, which is (x+7)²-47, which is answer a.
1 is 4 times greater than 1/4
If you multiply 1/4 by 4 you get 1
It is D because us the given equation all you do is plug in the x values given on the chart
I need more information to answer this question, so nobody can answer...
