You have a 2 litre jug of 3.5% milk (milk that contains 3.5% fat). how much skim milk (0% fat) do you need to add to it to obtain milk which will have 2% fat?

3.5% of 2 litres is 0.07 litres. (0.035 * 2 = 0.07)

0.07 litres is 2% of 3.5 litres. (0.07 / 0.02 = 3.5)

This means you have to add 1.5 litres of skim milk to get a mixture with 2% fat.

x=-2

infinite number of lines, so there is an infinite number of equations.

step-by-step explanation:

there are an infinite number of line that passes through the point (-2,5)

x=-2   is one line that passes through the point

y = 5 is another line that passes through the point

(these two lines are perpendicular to each other).

since the number of   numbers are infinite and the slope is the ratio of two numbers,(change in y over change in x) we can have an infinite number of slopes.     our only condition is that it passes through the point (-2,5)

well there are two answers for that.

1: you need 120 ones then that will equal up to 120.

2: you could also do one 100 and 2 tens.

those are the answers that i have thought of.