Tahani bought a sweater that regularly cost $40 for $30. She also bought a blouse
that was regularly priced at $25 for the same percent discount. What was the sale
price of the blouse?

15

Step-by-step explanation:  40 x 0.25 = 10 then 10 - 25 = 15

The slope of the line between points A and B is 0.25

Step-by-step explanation:

Here in this question, we simply aim at calculating the slope of the line between two given points;

The points in question are;

A(400,40) and B(480,60)

Mathematically, the slope of the line can be calculated using the formula:

slope = (y2-y1)/(x2-x1)

Where ;

x1 = 400

y1 = 40

x2 = 480

y2 = 60

Substituting the values, we have;

slope = (60-40)/(480-400) = 20/80 = 1/4 = 0.25