If x and y vary directly, and x = 12 when y = 3, what will be the value of x when y = 9?

36

Step-by-step explanation:

When a variable increases directly with another variable, it means that when one gets increased, the other must be increased by the same amount, therefore if X=12 when Y =3 then Y=3*3 aka 9 then X=12 must also be multiplied by 3 which equals 36

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0.0076, if you meant 4.125 divided by 0.03125 it would be 132

step-by-step explanation:

first you have to move the decimal in 0.03125 over until its behind the 5 which is 5 places over. now the number is 3125

then you have to move the decimal in 4.125, 5 places over. now the number is 4,112,500.

now you divide like you would normally would and get 0.0076