Answer:

Step-by-step explanation:
A = 30° and r = 12







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Answer:
21
Step-by-step explanation:
20 x 10 = 200 so 20 students sleep for 9 hours
that leaves 10
since 10 is half of 20, half of 2 is 1 so that last 10 = 1 student,
making 21 students
Answer:
(g o f)(x) =
(not simplified)
Step-by-step explanation:
(g o f)(x) = g(f(x))
g(x) =
f(x) = 
g(f(-5)) = g(
=
= 
g(-170) =
= 
<span>To remove any negative sign in front of a number, and to think of all numbers as positive (or zero). Example: |5|=5</span>
Answer:
Step-by-step explanation:
x = 3y.......(1)
x - 3y = 0 ....(2)
Substituting x in (1) into (2)
3y - 3y = 0
No solutions