There are 600 people in a concert hall. 2/5 of them are teenagers. 3/8 of the teenagers are girls. How many teenage girls are th
2 answers:
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Answer:
7
Step-by-step explanation:
Using the exact values for
cos45° = and tan60° =
, then
2(cos²45° + tan²60°)
= 2( ( )² + (
)² )
= 2( + 3 ) ← distribute
= 1 + 6
= 7
Answer:
C. 15
Step-by-step explanation:
Given:
Dividing Eqn. (1) thorough out by 2, we get
To solve for , multiply (3) by 3 and add (2) and (3).
i.e.,