Answer:
57
Step-by-step explanation:
first do what is in the brackets then the parentheses, then multiply the 3
Answer:
i'm pretty sure its B but it would be helpful if i could see a graph
Step-by-step explanation:
Its false because it can't repeat in a set.
Step-by-step explanation:
Total area of merged figure = area of vertical rectangle + area of horizontal rectangle.
![\therefore \: 3x(2x - 7) + (3x + 4)x = 85 \\ \\ \therefore \: 6 {x}^{2} - 21x+ 3 {x}^{2} + 4x = 85 \\ \\ \therefore \: 6 {x}^{2} + 3 {x}^{2} - 21x + 4x - 85 = 0 \\ \\ \huge \red {\boxed {\therefore \: 9 {x}^{2} - 17x - 85 = 0}} \\ hence \: proved.](https://tex.z-dn.net/?f=%20%5Ctherefore%20%5C%3A%203x%282x%20-%207%29%20%2B%20%283x%20%2B%204%29x%20%3D%2085%20%5C%5C%20%20%5C%5C%20%20%5Ctherefore%20%5C%3A%206%20%7Bx%7D%5E%7B2%7D%20%20-%2021x%2B%203%20%7Bx%7D%5E%7B2%7D%20%20%2B%204x%20%3D%2085%20%5C%5C%20%20%5C%5C%20%5Ctherefore%20%5C%3A%206%20%7Bx%7D%5E%7B2%7D%20%20%2B%203%20%7Bx%7D%5E%7B2%7D%20-%2021x%20%2B%204x%20%20-%2085%20%3D%200%20%5C%5C%20%20%5C%5C%20%5Chuge%20%5Cred%20%7B%5Cboxed%20%7B%5Ctherefore%20%5C%3A%209%20%7Bx%7D%5E%7B2%7D%20%20-%2017x%20%20-%2085%20%3D%200%7D%7D%20%5C%5C%20hence%20%5C%3A%20proved.)
The image is here, i am struggled with this problems too please help!