use the expression 16x to determine how many cups are in 7 gallons, where x represents the number of gallons.

Can someone me with my hwplz(only the circled ones)

Write the equations in logarithmic form 10^3=1,000

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters