Step-by-step explanation:
Angle 1 2 and 3 are angles that are in a triangle and all the angles in a triangle always add up to 180
so <1 +<2 +<3=180
Hope that helps :)
The answer would be 2.55792x10^2.
Answer:
x = -4
Step-by-step explanation:
3x + 5 = 4x + 9
3x - 4x = 9 - 5
-x = 4
x = -4
Answer:
5.5 min
Step-by-step explanation:
At time t=0 you have 72 grams
at time t = 22 min you have 4.5 grams.
Now
4.5/72 = (1/2)^(t/half-life)
and t=22, so
4.5/72 = (1/2)^(22/half-life)
taking log of both sides:
log(4.5/72)=(22/half-life)log(1/2)
solving for half-life gives half-life = 11/2 = 5.5min
another, easy, way to write this is -2 x 5 , you dont need to put the + sign in front of the number. the answer is -10
