Christina loses 2 1/2 pounds every month for a year. How much weight did she lose that year? There are 12 months in a year. Simplify (or reduce) your answer, if necessary.

30 pounds

Step-by-step explanation:

So for this problem you do 2 1/2 * 12, or 5/2 * 12. You get 60/2 = 30.

30 pounds

Step-by-step explanation:

We start by converting 2  1/2 pounds into its decimal form: 2.5 pounds.

Now we consider that there are 12months per year, therefore in one year she will lose:

2.5 * 12 = 30 pounds

the answer is c: divide the arc's degree measure by 360°, then multiply by the circumference of the circle.

delaney would like to make a 5lb nut mixture that is 60% peanuts and 40% almonds.

she has several pounds of peanuts and several pounds of a mixture that is 20% peanuts and 80% almonds.

let 'p' represent the number of pounds of peanuts needed to make the new mixture, and  

let 'm' represent the number of pounds of the 80% almond-20% peanut mixture.

:

p + m = 5

therefore

m = (5-p)

write an equation based on the percent of peanuts

1p + .2m = .6(5)

replace m with (5-p)

p + .2(5-p) = .6(5)

p + 1 - .2p = 3

p - .2p = 3 - 1

.8p = 2

p = 2/.8

p = 2.5 lbs of peanuts required

then

5 - 2.5 = 2.5 lbs of the peanut/almond mixture required

:

a) what is the system that models this situation?

p + m = 5

1p + .2m = .6(5)