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

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.