A river's current flows at a rate of 4 mph. A rower can row 5 miles down the river and back to his original starting point in 3 hours. Find the rowing rate in calm water.​

What are “like terms”? why can we only add like terms?

Will mark the brainliest.paula makes stained-glass windows and sells them to boutique stores. if her costs total $12,000 per year plus $4 per window for the frame. how many windows must she produce to earn a profit of at least $48,000 in one year if she sells the windows for $28 each?

Which angle is the smallest? also give me an explanation so i can complete it to other questions as well, : )