Answer:
C
Step-by-step explanation:
Using the Cofunction identity
sin(90 - x)° = cos x°, hence
cos80° = sin(90 - 80)° = sin10° → C
Answer:
84
Step-by-step explanation:
We can set up a proportion using fractions.

Now, let's cross multiply by multiplying 12 and 28 then dividing by 4.

Hope this helped!
Both are equal since 18.1 we can add to the right zero
then 18.10=18.1
Answer:
The equivalent ratios are:
16:10
8:5
48:30
Step-by-step explanation:
It is given that the ratios are equivalent ratios. So all the ratios will simplify to the same ratio. We can use this to find the ratios.
given ratio is:
16:10
which simplifies to
8:5
We can observe that the second ratio will be same 8:5
Now,

Hence,
The equivalent ratios are:
16:10
8:5
48:30
Y = 1, x = 1 hope this helps!