What is the variable x in 40+10x=5x-30

The income tax policy for residents of a tiny island nation that uses U. S. Dollars as its currency is as follows: The first $20,000 of a citizen's income is taxed at a rate of 10%. The next $30,000 of the citizen's income is taxed at a rate of 18%.

The sides of triangle are 9,11,13. The largest side of triangle like this is 39. The other two sides of the second triangle are?

Cans of lemonade and packets of crisps were bought for the school disco in the ratio 3:2. The organiser bought 120 cans of lemonade. How many packets of crisps did she buy?

Paula has a dog that weghs 3 times as much as carlas dog the total weight of the 2 dogs is 48 how much does paulas dog weigh

Which of the following sets could be the sides of a right triangle? {2, 3, } {3, 5, } {5, 8, 12}

A polling organization took a random sample of 1,600 high school students to determine how many high school students have a part-time job. Suppose 43% of all high school students have a part time job.

The least common do you nominator 1/3 and 1/5 is

David has c decks of cards. Each deck has 52 cards in it. Using c, write an expression for the total number of cards David has.

What is the recursive formula for the sequence 4, 7, 12, 19, 28?

William will be attending college next year. He thinks that even though the tuition is higher at College A it will cost less overall because it is in-state and College B is not. Do you agree with William? Explain.