It is c=3r because 2*3 is 6 and 4*3 is 12 and it is always times 3.
Answer:

Step-by-step explanation:
figure out 4a(x) and 2b(x) separately by distributing, and then add them together to get your answer.
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1 hour time 40 miles/ hour =1*40=40miles
0.5 *70=0.5*70=35 miles
40+35=75 miles
60 minutes+30 minutes= 90 minutes or 1 1/2hours
Answer:
Option C.
Step-by-step explanation:

Use the biquadratic formula.





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