The temperature dropped 12°F in 8 hours. If the final temperature was —7°F, what was the starting temperature?

Quick translate "x is 12 units from 20" into an equation. what are the values of x being described? if you can answer any of my other questions that'd be great too

The radius of the circle is 4 cm and the measure of the central angle is 90° the area of the sector with a central angle measuring 90° and radius of length 4 cm is vt cm the triangle in the sector is 4 cm the area of the triangle is v/cm² the area of the segment of the circle is (471 - ) cm?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²