Questions in mathematics

Questions in mathematics

[Done] A 5-gallon mixture contains 40% acid. A 3-gallon mixture contains 50% acid. What percent acid is obtained by putting the two mixtures together?

[Done] A dog groomer can clean five dogs in one hour. How many dogs can they clean in two-sixths of an hour?

[Done] Allam just finished a great meal at a restaurant in Wisconsin. The sales tax in Wisconsin is 5%, and it is customary to leave a tip of 15% for the server. The tip amount is calculated on the price of the meal before the tax is applied. (Sales tax is not calculated on tips.) If Allam ordered a $15 meal, how much money will he have to pay with tax and tip?

[Done] Multiply out the expression \((y + 9)(y + 2)\). Please show your work if possible.

[Done] Please help the question is in the picture x

[Done] Look at the following sequence: 729, 243, 81, 27... What is the next term?

[Done] What is 0.6 of 120?

[Done] What is the distance in space between the points with coordinates (-3, 6, 7) and (2, -1, 4)?

[Done] Frances is sewing a border around 2 rectangular tablecloths that each measure 9 feet long by 6 feet wide. If it takes her 3 minutes to sew on 1 inch of border, how many minutes will it take her to complete her sewing project? Write an expression, and then solve.

[Done] Mike can cut a 40-foot by 20-foot yard with a push mower in 25 minutes. At this rate, how many more minutes would it take him to cut a 40-foot by 30-foot yard?