He function f(d) = –3d + 60 gives the remaining life of a flashlight battery, in hours, d days after the start of a hike. what is the meaning of the y-intercept? the battery will run out of life 20 days after the start of the hike. the battery will run out of life 60 days after the start of the hike. at the start of the hike, the flashlight had 20 hours of battery life. at the start of the hike, the flashlight had 60 hours of battery life.

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.