Answer:
(x-4)(x-5)
That is the answer, hope it helps.
Answer:
c, d, a, b.
Step-by-step explanation:
I'm presuming that the original equation is 
.
First, isolate c. You can do this by subtracting 
from both sides: 
Next, simplify to 
.
Then, divide both sides by 7: 
Finally, simplify to 
.
Answer:
b = 55 degrees
Step-by-step explanation:
The angles 30, a, b and 45 must sum up to 180 degrees
Subtracting (30 + 45) from both sides leaves us with a + b = 105 degrees.
But b = a + 5. Substituting a + 5 in the equation above yields
a + a + 5 = 105 degrees, so that
2a = 100 degrees, and a = 50 degrees. Then b = a + 5, or b = 55 degrees.
You have to divide both by common factor, in this case it's 12
So 72/60 = 6/5
Thus, 6/5 is the simplest form.
