A roller coaster with a mass of 300 kg is at the top of a 75.0 m hill. It rolls down the hill on very low friction wheels and climbs up to the top of a 45.0 m hill. You must show all work to receive credit! Find: (a) the speed of the thing at the bottom of the first hill

(b) its speed at the top of the second hill.

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Use the elimination method to find the solution to the system of equations. 2x - 3y = -9 -x + 3y = 6

1. if we have 3 babies what is the probability they’re going to be all boys? 2. if we roll 2 die at the same time what is the probability of getting less than 10 on the first roll and a 5 on the second roll 3. if we have 3 babies what is the probability their is going to be 2 girls? 4. if we have 3 babies what is the probability of having no more than 1 girl? 5. it we have 3 babies and then have another 3 babies what is the probability of us having at least 1 boy and then having all girls?

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor