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Answer:
The number of a 10-oz cup of coffee was 6
The number of a 14-oz cup of coffee was 6
The number of a 20-oz cup of coffee was 5
Step-by-step explanation:
Let
x ----> the number of a 10-oz cup of coffee
y ----> the number of a 14-oz cup of coffee
z ----> the number of a 20-oz cup of coffee
we know that
-----> equation A
----> equation B
----> equation C
Using a equation System Solver (Wolfram Alpha)
The solution is
x=6, y=6, z=5
see the attached figure
therefore
The number of a 10-oz cup of coffee was 6
The number of a 14-oz cup of coffee was 6
The number of a 20-oz cup of coffee was 5
Answer:
Step-by-step explanation:
4r³=-2916
r³=-729
r=-9
b)s=
=
=