Photomath said 1/6 x (x-9) but I didn’t work it out
Hello from MrBillDoesMath!
Answer:
Choice B, -2 sqrt(85) / 85
Discussion:
By definition,
cos(@) = length of side adjacent to angle / hypotenuse
= -2/ ( sqrt ( (-2)^2 + (9^2) ) (usin Pythag. theorem)
= -2/ sqty (4 + 81)
= -2 / (sqrt(85)
Multiply numerator and denominator by sqrt(85):
= (-2 / ( sqrt(85) ) * (sqrt(85)/sqrt(85) )
= -2 sqrt(85) / 85
which is choice B
Thank you,
MrB
Every difference of squares problem can be factored as follows: a2 – b2 = (a + b)(a – b) or (a – b)(a + b). So, all you need to do to factor these types of problems is to determine what numbers squares will produce the desired results.
Answer:
No
Step-by-step explanation:
We can use the Pytaghorean theorem to verify it
4.4^2 + 5.5^2 = 6.6^2
19.36 + 30.25 = 43.56
49.61 = 43.56 (false)
Answer:
D) infinitely many solutions
Step-by-step explanation:
6x + 1 = 2(3x - 2) + 5
Distribute
6x+1 = 6x -4+5
Combine like terms
6x+1 = 6x+1
Subtract 6x from each side
6x-6x+1 = 6x-6x+1
1=1
This is always true, so x has infinite solutions
