Of the 60 animals on a certain farm, 2/3 are either pigs or cows. how many of the animals are cows? (1) the farm has more than twice as many cows as pigs (2) the farm has more than 12 pigs.

Step-by-step explanation:

either cow or pigs

Either pigs or cow = 40

(1) Let number of pigs be x

   then number of cows >twice of pigs = 2x

    number of pigs + number of cows  = 40

                number of cows = 40 -x

                   40-x > 2x

                   40 > 3x

               x <

               x < 12.33

               nearest integral number is 12

               so its 12

              so number of pigs will be 12 so that number of cows = 40 -12 = 28

           which is more than twice of number of pigs

             28 > 2( 12)  = 24

     (2)   number of pigs + number of cows = 40

        for x>12

               number of cows = 40 -x

                  x > 12

                 -x < -12

             adding 40 both sides

            40-x < 40-12

           number of cows <28

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )