Combine like terms to simplify the expression. 5x + 4 + 2x + 5

The Boston marathon is a very competitive race. To qualify for the Boston marathon, male runners must have completed a marathon in less than 3 hours and 5 minutes within the last year.

How do I change 7 into a fraction

What is the answer to this problem? 2 1/3 + 3 1/3 = ?

Solve for c. Reduce any fractions to lowest terms. Don't round your answer, and don't use mixed fractions. 55c+13≤75c+39

What will 28301 times 3923 equal

What percent of $257.00 is $12.85? Round answer to the nearest tenth of a percent.

Convert each rate using dimensional analysis. Round to the nearest tenth, if necessary. 45 mi/h = ___ ft/s a. 66 c. 26.4 b. 15.6 d. 19.2

Marsha wrote three $15 checks and six for $75 each. Which of the following expressions represents the change in her bank account? 3 (-15) + 6 (-75) -3 (-15) + - 6 (-75) -3 (15) + - 6 (75) 3 (-15) + - 6 (-75)

David earned a fixed salary each month. In January, he spent $400 and saved the rest. In February, he spent 10% more and his savings dropped by 20%. What was David's savings in January?

Simplify this expression: 2 Xx x X x 3 x y x y x y