Two angles are supplementary. one angle measures 2x, and the other angle measures 3x - 15. which equation can you use to find the measure of each angle? a) 2x + 3x - 15 = 90° b)2x - 3x - 15 = 180° c)2x - 3x - 15 = 90° d)2x + 3x - 15 = 180°

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.?

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 25, a standard deviation of 2.5, and margin of error of 5%