Answer:
It's none of the above
Step-by-step explanation:
GK is //
Both G & K are most definitely not the midpoints
G not the vertex of the right angle
5? 5 times 5 is 10, which is less than 12
Answer:
always true
Step-by-step explanation:
because it's same side inter angles
Answer:
1 + cosa sina
Step-by-step explanation:
cos³a - sin³a ← is a difference of cubes and factors in general as
a³ - b³ = (a - b)(a² + ab + b²) , then
cos³a - sin³a
= (cosa - sina )(cos²a + cosa sina + sin²a)
= (cosa - sina)(1 + cosa sina) [ sin²a + cos²a = 1 ]
Then
= 
← cancel (cosa - sina) on numerator/ denominator
= 1 + cosa sina
You should first of all distribute and combine like terms on both sides. You should subtract 6x from both sides. Once you have done that, you should add 80 to both sides and divide by 6 to get your answer as a simplified fraction of x=-2/3. The correct answer is b.
