Brian is remodeling his standy. He bought a desk for $437.50, a chair for $92.75, a filing cabinet for $99.99, and a bookshelf for $309.75. He bought everything at the same store and paid a 7 percent sales tax. How much did he spend on his study?

He spent $1005.7893 on his study

Step-by-step explanation:

At first, let us find the total of all items he bought

∵ The price of the desk = $437.50

∵ The price of the chair = $92.75

∵ The price of the filing cabinet = $99.99

∵ The price of the bookshelf = $309.75

→ Add all of them up

∴ The total price = 437.50 + 92.75 + 99.99 + 309.75

∴ The total price = $939.99

∵ He paid a 7 percent sales tax

∴ The tax = 7%

→ If the total price is 100% add it by 7% to find the amount that he paid

∵ The total price after added the sale tax = 100% + 7% = 107%

∴ He paid = 107% of $939.99

∴ He paid = × 939.99

∴ He paid = 1005.7893

∴ He spent $1005.7893 on his study

The equation y = 3x represents a proportional relationship, where y represents distance in miles, and x represents time in hours. The point (3, 9) represents that Alonso walks 9 miles in 3 hours. The point (5, 15) represents that Alonso walks 15 miles in 5 hours.