Answer:
10
Step-by-step explanation:
Plug in 2 for x.
f(2) = 3·(2)²-2
=3·4-2
=12-2
=10
Answer:
Train A - 80
Train B - 85
Train B is faster.
Step-by-step explanation:
Hope this helps! Pls give brainliest!
Answer:
24
Step-by-step explanation:
So, Dersan's path is a right triangle. You have to find the last side. You can use the triples or 6^2+8^2=c^2 but I'll use a triple.
3,4,5.
The last side is 10.
6+8+10=24
hope this helped!
Answer:
C
Step-by-step explanation:
A straight diagonal line going the middle of the graph is a proportianal relationship.
Given: sin theta = 2/5. This tells us that the lengths of the opp side and the hyp are 2 and 5 respectively. The adj side is found using the Pyth. Thm.: 5^2-2^2= 25-4 = 21, so that the adj side is sqrt(21).
The double angle formula for the sine is sin 2theta = 2 sin theta *cos theta.
In this particular problem, the sine of 2theta is 2*(2/5)*[sqrt(21) / 5], or:
(4/25)*sqrt(21).
