Questions in mathematics

Questions in mathematics

[Done] 20% of my money is £2.55. What is [tex] \frac{2}{5} [/tex] of it?

[Done] In the library, there are 200 books. Fifty-eight of them are non-fiction. What percentage of the books are non-fiction?

[Done] The sum of a number and 18 times its reciprocal is 11. Find the number(s). Let \( x \) represent the unknown number. The reciprocal of \( x \) is ____?

[Done] Solve the inequality: \[ 2m - 7 \geq 13 - 2m \]

[Done] 47.8 is 10% of what number? How do I calculate it?

[Done] Rachael's backyard swimming pool is being emptied by a pump. The amount of water in the pool (\(W\), measured in gallons) at any time (\(t\), measured in hours) is given by the following equation: \[W = -250t + 9000\] a. How many gallons of water are being pumped out each hour? Explain. b. After 11 hours, how much water is left in the pool? Explain. c. How much water was in the pool at the start? Explain. d. How long will it take the pool to empty? Explain.

[Done] What is [tex]\sqrt[3]{16}[/tex] simplified?

[Done] Is 5.33 a rational number?

[Done] Cutting a 4-foot ribbon into 7 equal parts, how long is each piece?

[Done] Represent the following statement by an equation: 17 times the sum of a number \( n \) and 31 is 357. What is the value of \( n \)?