Q: Ryan has 30 stickers. Steven has thrice as many stickers as Ryan. Terry has 20 more stickers than Steven. How many stickers do they have altogether?
A: Steven has 3 x 30 = 90 stickers. And, Terry has 90 + 20 = 110 stickers. Therefore, they have 30 + 90 + 110 = 230 stickers altogether. The answer is 230.

Q: A restaurant is offering a fundraiser one day where they donate $2 for every $10 donated by customers. The average customer donates 3 and there are 40 customers that day. How much does the restaurant donate?
A: Customer donated a total of $120 because 40 x 3 = 120. They got $10 a total of 12 times because 120 / 10 = 12. They donated $24 because 12 x 2 = 24. The answer is 24.

Q: Maria wants to paint a picture and needs some tools to do that. She wants to buy a set of brushes for $20 and some canvas for three times more than the brushes. The paint costs Maria $8 per liter, and she needs at least 5 liters. How much money will she earn on the painting if she will be able to sell it for $200?
A:
Maria wants to pay 3 * 20 = $60 for the canvas. Maria needs 5 liters of paint, so the cost of it would be 8 * 5 = $40. So in total Maria will earn 200 - 40 - 60 - 20 = $80 if she will be able to sell the painting at the mentioned price. The answer is 80.