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increase:
a) 500 by 10%
b) 320 by 10%
c) 80 by 15%
d) 75 by 25%
show your workings

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

How do you solving the solution of each system using elimination?

Awater tank holds 18000 gallons. how long will it take for the water level to reach 6000 gallons if the water is used at anaverage rate of 450 gallons per day