Answer:
D
Step-by-step explanation:
The hypotenuse is x and the adjacent side to the given angle is 54
cos20° = 
= 
Step-by-step explanation:
the average velocity of a car that travels 50 km in 2 hrs = 50/2 = 25 km/hrs
Answer:
b
Step-by-step explanation:
Answer:
syd is 23 and dev is 69
Step-by-step explanation:
Let Dev's age be x and Syd's age be y
Since Dev is 3 times older than Syd, we may write
x
=
3
y
Since the sum of their ages is 92, we may write
x
+
y
=
92
Now replacing x with 3y, we get :
3
y
+
y
=
92
Hence
y
=
92
4
=
23
and so Syd is 23 year old.
Back substituting we get Dev is 69 years old.
Answer:
That would be obtuse
Step-by-step explanation:
Those are all more than 90 degrees!
