1st question: Kathy and Cheryl are walking in a fundraiser. Kathy completes the course in 5.4 hours and Cheryl completes the course in 9 hours. Kathy walks two miles per hour faster than Cheryl. Find Kathy's speed and Cheryl's speed in miles per hour.

2nd question: Mario invested $665 in $45 and $25 stock shares. The number of $25 shares was seven less than three times the number of $45 shares. How many of each type of share did he buy?

on friday there were 15 birds

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing im pretty sure that is the right answer

step-by-step explanation: