Answer:
8.875
Step-by-step explanation:
It's just not realistic to present a list of 12 math questions and ask for the answers to all of them at once. Please post only one question at a time and please share your thoughts about how to solve that question.
I'll focus on one problem: <span>7 2/3 + 2 7/12
Here the LCD (lowest common denominator) is 12. 7 2/3 becomes 7 8/12.
Add 7 8/12 and 2 7/12:
7 8/12
+2 7/12
-----------
9 15/12 15/12 is not a proper fraction. Write it as 1 3/12, or 1 1/4.
Then your 9 15/12 becomes (9+1) 1/4, or 10 1/4.</span>
$180 is the cost of the goal, and $15 is the cost of each soccer ball.
Answer:
see explanation
Step-by-step explanation:
Consider the left side
A + 
A - 2cos²Asin²A ← is the expansion of
= (cos²A - sin²A)²
Substitute sin²A = 1 - cos²A
= (cos²A - (1 - cos²A) )²
= (cos²A - 1 + cos²A)²
= (2cos²A - 1 )²
= right side , then proven
Step-by-step explanation:
acute or right angle hope it helps.
