In a certain chemical, the ratio of zinc to copper is 3 to 11. A jar of the chemical contains 264 grams of copper. How many gra
2 answers:
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Answer:
Step-by-step explanation:
Let
x ----> the length of Zach's car
y ----> the length of Ginny's car
we know that
The sum of the lengths of both cars is 30 inches
so
----> equation A
Ginny's car is 2 more than 3 times the length of Zach's car
so
----> equation B
substitute equation B in equation A