Using the numbers and symbols, solve 7x = 42

Find the missing factor in exponential form 48^2=3^2 • ?

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.