Which situation involves a change modeled by a negative number but an end result modeled by a positive number? Jake started his hike at an elevation of 23 meters, traveled down the mountain and stopped at an elevation of -2 meters. Marissa had $64 in her savings account. She then withdrew $20 to buy some sandals. Lorelei owed her mother $15. She then got $10 in a birthday card from her grandmother. Javier was scuba diving and swam up 6 meters from the ocean floor to sea level to reach his boat.

You are responsible for designing a new city. you are inspired by pierre charles l'enfant, who laid out the streets of our nation's capital. numbered streets run north and south, and lettered streets run east and west. avenues are named after states, and they intersect the streets on a diagonal. the streets are parallel and the intersections form similar triangles. 18th st. is 454 meters long and the intersection of 18th and k st. is 207 meters from connecticut ave. if 19th st. and k st. is 385 meters from connecticut ave., what is the length of 19th st.?

What is the value of  y  in the solution to the system of equations? x  +  y  =  12x  –  3y  =  –30a. –8b. –3c. 3d. 8

(if f(x)=4x^2 and g(x)=x+1, find (f o g)(x)