Hello from MrBillDoesMath!
Answer:
Choice B, -2 sqrt(85) / 85
Discussion:
By definition,
cos(@) = length of side adjacent to angle / hypotenuse
= -2/ ( sqrt ( (-2)^2 + (9^2) ) (usin Pythag. theorem)
= -2/ sqty (4 + 81)
= -2 / (sqrt(85)
Multiply numerator and denominator by sqrt(85):
= (-2 / ( sqrt(85) ) * (sqrt(85)/sqrt(85) )
= -2 sqrt(85) / 85
which is choice B
Thank you,
MrB
Answer:
C
Step-by-step explanation:
Answer:
The first one is C I don't know the second one though
Step-by-step explanation:
Answer:
6 hours and 45 minutes
Step-by-step explanation:
162÷24=6.75
6.75=6 hours and 45 min
5400 = -3 8850-5100=3750m 1c = 100m
5300 = -2 3750/100 =37.5
5200 = -1
5100 = 0
answer = 37.5 degrees C
