If sales tax is 7% what would u pay on 15$

15(1.07)=COST
I wrote 1.07 because multiplying a number by 1 doesn't change anything but multiplying the number by the sales tax as a fraction of the whole does (7/100 = 0.07).

The cost with 7% sales tax is $16.05.

2x + y < 7

Step-by-step explanation:

First we find the slope of the line that passes through the given points.  The formula for slope is:

Using our points, we have

The y-intercept will be the point where the data crosses the y-axis.  All y-intercepts have an x-coordinate of 0; since we already have the point (0, 7), we have the y-intercept at 7.  This makes our equation

y = -2x + 7

The inequalities we're given are written in standard form, Ax+By=C.  This means we need x and y on the same side of the equals in our equation.

Since the inequality is graphed below the line, we want our inequality to be

y < -2x+7

To move the x-value to the other side of the equation, we will add 2x to each side:

y+2x < -2x+7+2x

y+2x < 7

2x+y < 7