Solve the problem by setting up and solving a system of three linear equations in three variables. a box contains $7.20 n nickels, dimes, and quarters. there are 42 coins in all, and the sum of the numbers of nickels and dimes is 2 less than the number of quarters. how many coins of each kind are there

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)

Plz answer asap! i will reward brainliest and 12 points for these three questions!take notice: these three questions are completely different! 1) what is the percentage of sugar in the syrup made of 10 kg of water and 4 kg of suugar? 2) what was the original price if after 10% discount it became $450? 3) at first a price was decreased by 12%, then it was disounted again by an additional 5%. what is the percent of the total discount? , and remeber i will award brainliest and 12 points!