What tell you which operation to perform first so that everyone finds the same value for an expression

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.?

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?