(a) In triangle ABC, the line BD is perpendicular to AC. AD= (x + 6) cm, DC = (x + 2) cm and the height BD=(x + 1) cm. The area of triangle ABC is 40 cm? i) Show that x2 + 5x - 36= 0. ii) Solve the equation x2 + 5x – 36 = 0. iii) Calculate the length of BC.

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry

Can someone me with my math problem pls my teacher is on my back about this

Sandy is upgrading her internet service. fast internet charges $20 for installation and $52.45 per month. quick internet has free installation but charges $57.45 per month. part 1 out of 2 complete the equation that can be used to find the number of months after which the internet service would cost the same. use the variable x to represent the number of months of internet service purchased.