The 20-pound cat and the 4-pound board weigh 24 pounds total or, divided by 2, 12 pounds per scale.

When meshing or interlocking gears have different numbers of teeth, the gear with fewer teeth will rotate faster than the gear with more teeth. If two gears are meshed, both cannot be driven or something will break--one must be driving and one must be driven.

First calculate the distances driven during the two legs of the trip.
Leg 1: 2 hours x 70 mph = 140 miles
Leg 2: 1.5 hours * 65 mph = 97.5 miles
140 miles + 97.5 miles = 237.5 miles
Now divide the total distance traveled by the car's gas mileage rate.
237.5 miles 4- 25 mpg = 9.5 gallons

The equation 2x--3 = 37 means that "twice a number minas 3 is equal to 37." To arrive at a value for*, we first eliminate -3 on the left side. This can be done by adding 3 to both sides of the equation, thas undoing the subtraction.
2x-3 + 3 = 37 + 3
2x = 40
To eliminate the 2 that multipliesx,we undo the multiplication by dividing both sides of the equation by 2.
2x /2 = 40/2
= 20

To calculate the new wage, start off by multiplying $8.15 0.07 = $0.57. Then add that number (the amount of Joe's raise) to his original hourly wage. Joe's new hourly wage is $8.15 + $0.57 = $8.72.