What’s the answer for liner combination to eliminate one of the variables. but which one of theses equations can replace 3x+5y=59

Which functions shave a maximum and are transformed to the left and down of the parent function ,check all that apply f(x) = x2? p(x) =14 (x+7)2 + 1

Which letters from the table represent like terms? a and b b and c a and d b and d

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?