Rachel is a stunt driver, and she's escaping from a building that's about to explode! She is driving to get to the safe zone at a constant speed.

This is the formula for the remaining distance D (measured in meters) as a function of time t (measured in seconds):

D(t)=−38t+220

What does the 220 represent in this function?

the area of the building

the number of seconds it takes to get to the safe zone

the initial distance between Rachel and the safe zone

the meters Rachel drives per second

Where m is the slope of the line and b is the y-intercept of the line, or the y-coordinate of the point at which the line crosses the y-axis. to write an equation in slope-intercept form, given a graph of that equation, pick two points on the line and use them to find the slope. this is the value of m in the equation.

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle