In science, a velocity in one direction would
be shown as (+) and velocity in the opposite
direction would shown as (-). A baseball
pitcher threw a fastball at a velocity of 42
meters/second. When the batter hit the
ball, it changed velocity to the opposite
direction, moving at 50 meters/second.
According to science, how much did the ball
change velocity when it was hit?

I know that the answer is 92 but idk How it is so can you tell me

The monthly texting plan of all star cell is $11 per month and $0.25 per text. the monthly texting plan of top line cell is $14 per month and $0.15 per text. a student wants to set up a system of equations to find the number of texts for which the total monthly cost of the two companies is the same. he uses the variables x and y. he lets y represent the total monthly cost. what will x represent? x = number of texts x = cost of the total number of texts x = total monthly cost x = cost of each text