At the start of the month a shop had 20-inches and 40-inches television sets in the ratio 4: 5. by the end of the month, 200 20-inches and 500 40-inches were sold and the ratio of 20-inches to 40-inches television sets became 1: 1. how many television sets of each type were there at the start of the month?

Which of the following represents the factorization of the trinomial below? x^2+7x-30

In a coastal town, the humidity, measured in grams of water per kilogram of air, increases by 43% for every 1 degree celsius increase in temperature. a scientist observes that the humidity on monday morning is 5.75 grams per kilogram. he wants to know how much the temperature must increase for the humidity to reach at least 49.17 grams per kilogram. let t represent the increase in temperature, in degrees celsius, from monday morning's observation. write an inequality to represent the situation, and use it to determine the desired temperature increase.

Look at the figure xyz in the coordinate plane. find the perimeter of the figure rounded to the nearest tenth.