Answer:
13.5
Step-by-step explanation:
the two medians are 12 and 15. you need to then find the average. 12+15=27. 27/2=13.5.
Answer:

Step-by-step explanation:
Let's re-write the equations in order to get the variables as separated in independent terms as possible \:
First equation:

Second equation:

Third equation:

Now let's subtract term by term the reduced equation 3 from the reduced equation 1 in order to eliminate the term that contains "y":

Combine this last expression term by term with the reduced equation 2, and solve for "x" :

Now we use this value for "x" back in equation 1 to solve for "y":

And finally we solve for the third unknown "z":

Answer:
4
step by step if she has 7 cups and already put in 3
7-3=4
I cant see the picture could u please post another one?
Answer:
20
Step-by-step explanation:
u have to look at the 9 after the decimal and if it is 5 or above then it goes up