There are 19 animals in the field. Some are cows and some are ducks. There are 60 legs in all. How many of each animal are in the field? (I mostly need to know the system of equations

the bottom of the spinner is not flat.

step-by-step explanation:

180

step-by-step explanation:

6 hours 48 min

step-by-step explanation:

68÷5=13.6

13.6×30=408min=6 hours 48 min.

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step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.