An air traffic controller is tracking two planes. To start, Plane A was at an altitude of 820 meters, and Plane B was at an altitude of 1234 meters. Plane A is losing altitude at 15 meters per second, and Plane B is losing altitude at 24 meters per second.

Let x be the number of seconds that have passed.

For each plane, write an expression for the altitude of the plane after x seconds.

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.

60°

step-by-step explanation:

the measure angle of c in an isosceles triangle abc is 60° because in isosceles triangle,the measures of all the angles is 60°.

replication and blocking

step-by-step explanation: