The given figure shows a circle with centre at o and angel aob=90degree. if the radius the circle is 40c. m and pie=3.14; calculate the area of the unshaded portion of the circle

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.?

Which is an equation for the nth terms of the sequence 12,15,18,21

What expression is equivalent to (2x-1)(x-3)?