2x + 5y = 11
7x – 5y = 16

Asphere has a diameter of 10 in. what is the volume of the sphere?

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?

Many newspapers carry a certain puzzle in which the reader must unscramble letters to form words. how many ways can the letters of emdangl be arranged? identify the correct unscrambling, then determine the probability of getting that result by randomly selecting one arrangement of the given letters.