Writ an equivalent expression for 7x + 4x + 3 - 1

11x +2

Step-by-step explanation:

This question involves combining like terms.

So you need to know that two add 7x and 4x, we add the coefficients (7 and 4) to get 11x. Then for +3 -1, we just simply work this out as 3-1 = 2.

So we now have 11x +2. As 11x and 2 are not 'like terms', we cannot simplify any further.

let's cover over the formula of the vertex:

y = a(x – h)^2 + k

in this formula, (h,k) are the vertex, always remember that the positive or negative value of the vertex is based on the sign it has.

for example, if the vertex is -3,-6 then both the x and y value would have the positive sign attached to it and if it were a positive x and y value, then a negative sign would be attached to it.

with that being said, for our problem the x value is a positive one so we are looking for a number with a negative sign next to it, in this case the first and second choice.

however, for the first answer choice it isn't quite part of the formula so we know that the answer choice correctly displays the x value.

to confirm, we can see if the -1 fits correctly with the second answer choice, and as mentioned above a negative number will have a positive sign attached to it. so, for our problem we can see that -1 has been changed to +1, so we can confirm that the second answer choice is correct.

hence, our final answer is y=(x - 1)^2 + 1

x coordinate is none

step-by-step explanation: