I assume you mean 12 and 4/7. A whole number is a number without a decimal or fractional part, so you can't do it.
But, it CAN be written as a fraction.
First express 12 as 12/1. Now multiply 7/7 (both numerator and denominator by 7).
Note that this doesn't change...

The y-intercept is the value of y when x=0

let n= one of the integers (the lesser one)
then since they are consecutive, the other is (n+1).
Now just write the problem as an equation:
n + (n+1) = -105
can you solve it?

There are 2 price changes; the initial price (callit x0) falls to x1, then x1 rises to x2.
Part 1: x0 falls by 27% to x1, this is the same as saying x1 = (1-.27)*x0 = 0.73*x0
[ You can check this by the definition of fractional change :...

You are given D=distance, V=Speed(also called velocity), and you are asked for T=time.
The relationship among these 3 variables is:
D(mi) = V(mi/hr) * T(hr).
You have D and V, you need T. Using algebra to solve for T:
T = D/V D= 3/4...

let n= one of the integers, then the problem is written as follows;
n*(n+1) = n + (n+1) + 5
Expand and combine to form the following quadratic;
n^2 -n -6 = 0
Factor; (n-3)*(n+2) = 0 n= +3, or -2(ignore, need Positive...

Not sure what the question is; can you clarify?