Questions in mathematics

Questions in mathematics

[Answered] Eleni is \( n \) years old. In thirteen years, she will be twenty-four years old. Solve for \( n \).

[Answered] If, 2 = 5 3 = 10 4 = 17 5 = ??

[Answered] Of the 400 doctors who attended a conference, 240 practiced family medicine, and 130 were from countries outside the United States. One-third of the family medicine practitioners were not from the United States. What is the probability that a doctor practices family medicine or is from the United States?

[Answered] Carmen listed the multiples of 6 as 1, 2, 3, and 6. Is she correct? Explain why or why not.

[Answered] An author is having a book signing at a store. He agrees to give 5% of his profit to literacy programs and 15% of his profit to his manager. If he makes a profit of $200.00, how much of his profit does he take home?

[Answered] A department store is having a 55% off sale on all sport coats. If you have a coupon for an additional 10% off any item, how much will a $230.00 sport coat cost? Hint: First, find the sale price of the sport coat and then take the coupon discount off the sale price.

[Answered] Round this number to the nearest hundredth: 3.899

[Answered] What is the total donation? A student is raising money for cancer research. A local business agrees to donate an additional 25% of what the student raises, while a local politician also agrees to donate an additional 5% of what the student raises. If the student raises $450.00, what is the total donation? (Hint: The total donation is the amount the student raises plus the additional donations.)

[Answered] Danny reads 4 pages of a book each day. After 12 days, he still has 82 pages left to read. How many pages does the book have?

[Answered] What is the reference angle for 150 degrees?