Tyler says he invented a number puzzle he asked Claire's to pick a number then ask her to do the following triple the number
subtract 7
double the result
subtract 22
divide by 6
Clara says that now she has a -3 Tyler says that her original number must have been 3 how did Tyler know that explain your reasoning

Which mathematical statements are true? 1) if 3 is an odd number, then 3 times 3 is an even number. 2) if 6 is less than 7, then 4 is greater than 7. 3) six is divisible by 3, and 10 is a multiple of 2. 4) the average of the data is greater than the largest value in the data, or it’s less than the largest value in the data. 5) the slope of a linear graph is its rate of change, and the graph’s y-intercept is the initial value. 6) if an equilateral triangle has equal angles, then all its angles will measure 45°.

At the electronics store you have a coupon for 20% off up to 2 cds you buy for cds with the original cost of $10.99 each the sales tax is 5% what is the total cost of your purchase

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14