Andrew studied x hours on Monday, y hours on Tuesday, and z hours on Wednesday. Which expression represents the average number of hours per day Andrew studied? A. x+y+z
B. 3(x+y+z)
C. 3(xyz)
D. x+y+z

3

You are responsible for designing a new city. you are inspired by pierre charles l'enfant, who laid out the streets of our nation's capital. numbered streets run north and south, and lettered streets run east and west. avenues are named after states, and they intersect the streets on a diagonal. the streets are parallel and the intersections form similar triangles. 18th st. is 454 meters long and the intersection of 18th and k st. is 207 meters from connecticut ave. if 19th st. and k st. is 385 meters from connecticut ave., what is the length of 19th st.?

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)