We need to make a system of equations. A=Adults and C=Children. A+C=350; this means how many people are there. 3A+2C=900; this deals with money. We need to eliminate a variable, let's eliminate C by multiplying the first equation by -2. -2a-2C=-700 3A+2C=900 A=200 This means there was 200 adults, which means there had to be 150 children.
The distance ( S ) is represented by the equation: S ( t ) = - 16 t² + 25 - 16 t² + 25 = 0 - 16 t² = - 25 / · ( - 1 ) 16 t² = 25 t ² = 25 / 16 t = √( 25/16) = 5/4 = 1.25 s ( we will not accept the negative value ) Answer: The acorn is moving trough the air for 1.25 seconds.
