Answer:
D. all real numbers
Step-by-step explanation:
The domain is all the x's on a graph or that are permitted in an equation (if you have an equation instead of a graph)
If there is nothing on the graph to indicate the graph is a segment (endpoints that are either closed or open) or has other holes in it (literally a point on the line that is open) then the domain for a linear function (a line) is always all real numbers. The same is true for all of the above for the range as well, except the range is all the y's
You could understand the ration as parts: the total number of parts was 3+7=10.
So girls were 3/10 parts and boys 7/10 parts. The difference was 7-3=4 parts. this difference is equal to 360, so each part is 90 (4*90 =360).
so girls are "3 parts" and each part is 90, then the number of girls is 3*90=270.
The triangles are shown to be similar, therefore
The answer is 9 units
Cos^2Θ(1 + tan^2Θ)
Use the Pythagorean identity to simplify the parentheses:
cos^2Θ(sec^2Θ)
Use the inverse identities:
cos^2Θ(1/cos^2Θ)
Distribute:
cos^2Θ / cos^2Θ
Simplify:
1