Reggie lost 2 spaceships in level 3 of a video game. He lost 50 points for each spaceship. When he completed level 3, he earned a bonus of 550 points. By how much did his score change?
His score changed by a total of
points.

)a smart phone has dimensions of 4.9 inches (height), 2.3 inches (width) and 8.0 millimeters (depth). what is the volume of the smart phone in cubic centimeters? (1 in = 2.54 cm)

What situation is an example of an observational study

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais