Questions in mathematics

Questions in mathematics

[Jawaban] Solve the equation: \[ \frac{2}{3} = \frac{18}{x+5} \]

[Jawaban] Five added to twice Erik's age is the same as three times his age minus two. How old is Erik?

[Jawaban] Carlos wants to practice piano for 2 hours each day. He practices for [tex]\frac{3}{4}[/tex] hour before school and [tex]\frac{7}{10}[/tex] hour after school. 1. How many hours has he practiced? 2. How many hours until he meets his goal?

[Jawaban] To download movies off the internet, you must pay $1.99 per movie, plus a one-time fee of $5.50. Write an expression to show the total cost to download [tex]x[/tex] movies.

[Jawaban] The area of a pentagon increased by 27 is the same as four times the area of the pentagon, minus 15. What is the area of the pentagon?

[Jawaban] A college basketball team won 72.5% of the games they played. If they played 80 games, how many games did they win?

[Jawaban] If 40% of a number is 56, what is the original number?

[Jawaban] What temperature is 23 degrees less than 8 degrees Fahrenheit?

[Jawaban] 654 divided by what number is 218?

[Jawaban] Find the selling price of a $450 painting with a 45% markup.