Which statements about solving the problem (0.1 × 5) + 0.4 are true? Check all that apply.
using a calculator will be much more efficient to solve the problem because there are multiple decimal operations to perform.
All of the calculations can be done quickly by hand, so using a calculator will be less efficient.
The first calculation cannot be done quickly by hand, so using a calculator will be more efficient.
If a calculator is going to be used, it is a good idea to compare it to an estimate of the actual calculation done by hand.
Using a calculator or solving the problem by hand can both result in the correct answer.

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