Answer:
3.16227766 i think sorry if i am wrong.
Step-by-step explanation:
Answer:
a=72
Step-by-step explanation:
54/3=18
18*4=72
a=72 when b=4
First - Since you have a in the numerator and denominator, you can cancel them and get:
8r/12
Second - Since both 8 and 12 have common factors, you can find the GCF and divide both by that number.
GCF = 4
8/4=2
12/4=3
Answer:
2r/3
Let’s say the first class is X.
Avg(X)= x/20=15
X=300
Let’s say the second class is Y.
Avg(Y)= Y/30=20
Y=600
X+Y=900
AVG(X+Y)=900/(20+30)=900/50=18
The average of both classes is 18.
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