The sum of 9 and twice a number

I need to write this as an algebraic equation.

The unknown number is n

The old price for school lunches is $5. The new price is $5.25. What is the percent increase in the cost if school lunches? Write answer as percent. The formula is p=b-a/a. b = new price for lunch. a=old price for lunch. P=percent increase

5 (2x-6) - 4 (x-7) simplify

A diesel train left the station and traveled north. Seven hours later a cattle train left traveling at 80 km/h in an effort to catch up to the diesel train. After traveling for three hours the cattle train finally caught up.

What is the area of the figure? cm2 Six sided figure with top side equal to eight centimeters and base equal to twenty-four centimeters. A dased line in the middle of the figure is parallel to the top and bottom and measures twenty four centimeters.

Which equation has infinitely many real solutions? A. 0.8x + 12 = x - 12 B. 0.8 (x - 15) = 0.8x - 12 C. 0.8x + 12 = - 0.8x + 12 D. 0.8 (x - 15) = 0.8x + 12

If there are 1.61 kilometers in a mile and also 5280 feet in a mile, the how many feet are there in 3 kilometers

Find the least common multiple of 6, 2 and 9

A line is imaginary. True or False?

Exercise Each pair of figures is similar Find the value of the factor in the endangement

Which of the following describes the meaning of surface area of a solid? the amount of solid can hold the total area of all the surfaces the area of the base of the solid the total area of one of the faces of the solid