Ruby ate 1/3 (fraction) of a pizza, and angie ate 1/5 (fraction) of the pizza. how much pizza did they eat in all?

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Right triangle xyz has a right angle at vertex y and a hypotenuse that measures 24 cm. angle zxy measures 70º. what is the length of line segment xy? round to the nearest tenth. 8.2 cm 8.7 cm 22.6 m 25.5 cm

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?