The supplement of 89° is the angle that when added to 89° forms a straight angle (180° ).
Answer:
Yes, BC || DE
Step-by-step explanation:
set up proportion and cross multiply to solve:
15/10 = 12/8
120 = 120
This is true! You can justify by explaining how you cross multiplied like the bold words above :)
Factor out a GCF of 4, then you are left with perfect squares.
4(100-9x^2)
Factor what is left as a difference of perfect squares (the outside and inside terms from FOIL should cancel out which is why each parenthesis has a different sign
f(10+3x)(10-3x)
Answer:
(x + 4) (x - 9)
Step-by-step explanation:
Factor the following:
x^2 - 5 x - 36
The factors of -36 that sum to -5 are 4 and -9. So, x^2 - 5 x - 36 = (x + 4) (x - 9):
Answer: (x + 4) (x - 9)