how to solve equations

3y-2x=11

y+2x=9

Factor the perfect square trinomial 4x²+12x+9

A right triangle has side lengths that are consecutive integers and has a perimeter of 12 ft. What are the angles of the triangle

At 2pm the level of the water in the pool was 10feet. At 6pm the level of water was 2 feet. What is the constant rate

Catherine has an unpaid balance on her credit card of $345.38. She has new charges of $195.65 this month and her monthly interest rate on the unpaid balance is 1.75%. What is the total balance on her monthly bill (to the nearest whole cent) ?

Can you see the conversion pattern? Can you make up rules for converting between the following units of weight. Write your rules below each unit Milligrams Centigrams Decigrams Grams. Decagrams Hectogram 5,465,000 546,500 54,650 5,465 546.5 5.465

Assume that a set of test scores is normally distributed with a mean of 480 and a standard deviation of 20. What percentage of scores lies between 470 and 526?

The angular velocity of a fan blade is 4.6 radians per second. Approximately how many revolutions does the fan blade make in 2.4 minutes? State your answer, rounded to the nearest tenth of a revolution.

What is 2 plus 2 plus 3 plus 6 plus 5

40 dogs every 5 hours how may per hour

A box contains 9 green balls, 16 red balls, 9 white balls, and 6 pink balls. What is the probability of drawing a pink ball out of the box? A) 1/16 B) 3/20 C) 2/5 D) 7/8