Answer:
7 minutes and 30 seconds
Step-by-step explanation:
it's the middle of 6 and 9
Answer:
-6.3
Step-by-step explanation:
7/10 X -9/1 = -63/10 = -6.3
Answer:

Step by step explanation:


Answer:
12
Step-by-step explanation:
This is a joint variation problem:
z varies directly as x and y
Interpreting this;
z ∝ xy
Therefore;
z = kxy
z = 6, x = 2, y = 6
Now find k,
6 = 2 x 6 x k
6 = 12k
k =
To find the value of z;
x = 3, y = 8
z =
x 3 x 8 = 12