What is 2x - 4 + 3x as an expression

In my pre al worksheet the question is "why did the population expert feel like he was going crazy?" does anyone know this?

Dog weighs 31/2 pounds gains 2/3pounds a week how much does he weigh after 8 weels

A student claims that 8^3 • 8^-5 is greater than 1. Explain wheather the student is correct or not.

If a line is perfectly vertical, meaning it reaches all y - at a single x-, which kind of slope does it have? A. Zero B. Undefined C. Negative D. Positive

1. Stewart had 30 candies in his pocket. If he gave of the candies to his younger sister, what percent of the candies did he give to his sister?

28 grams x 10$ = $280 or $200 street price ...

The league championship 800 meter race has 9 runners. In how many different ways they place first, second and third?

Rectangle x measures 7cm by (x+1) cm. Rectangle B has dimensions of (3x+6) cm and 4cm. The area of rectangle X is half the area of rectangle Y. Calculate the lengths of the sides of the rectangles, and hence, their areas.

A gym membership costs $50 to join and $12 each month. write and use an algebraic expression to find the cost of the gym membership for 6 months.

Find the surface area of a cylinder with radius 7 feet and height 16 feet.