Pls help i will give brainlest

Iwill give brainliest only if your correct the words subsequent and submerge both contain the prefix sub. based on this information, what does the prefix sub most likely mean? a) under or secondary b) true or verifiable c) tricky or difficult d) around or centered on

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?