its B
That factors to (b + 3)(a + c)
A 100- 90 b 89- 80 c 79- 70 d 69- 60 f 50 -0
2a + 4b + 8c = 2(a + 2b + 4c) You could also continue by factoring the inside of the parentheses a bit: 2a + 4b + 8c = 2(a + 2b + 4c) = 2(a + 2[b + 2c])
Recall distributivity a(b + c) = ab + ac = (b + c)a and associativity (ab)c = a(bc) (a + b) + c = a + (b + c) as well as commutativity ab = ba a + b = b + a we are gonna need those. See for yourself when I applied each to learn the trick: ax - bx - ay + yb = (ax - bx) + (-ay + yb) = x(a - b) + -y(a - b) = (x - y)(a - b)
is a negative number plus another number...., but not neccessarily a positive number b/c the first number may be greater than the second e.g. -5-(-2) that is -5+2, which is -3 2 negatives make a positive
(b-c)(a+b)-ac
If your Problem is organized like this: A x squared plus B x plus C, the equation is: (B plus or minus the square root of(B squared minus 4 A C)) over 2A
It's average. Mostly they say a 2.0 is average, but in reality because of grade inflation a 3.0 is more like average in college. You're not failing, but it'd be better if you could pull your average up above 3.0.
It depends on the school's grading system, and whether the school uses plus or minus grades. Thus, it could be either a C+ or B-.
C minus B equals AB
When b is zero.
A=8 B=4 C=14 Yes, I know I'm a genius. Mak - the all knowing one. MWAHAHAH!
a^(2) - b^(2) + ac - bc Factor ( a - b)( a + b) + c(a - b) Factor further (a - b)(a + b + c) Done!!!!!
a - b = c -(a - b) = -c b - a = -c
For schools that grade on the plus system it would be a C+. For those on a minus system B-.
(a + b)/(a - b) = (c + d)/(c - d) cross multiply(a + b)(c - d) = (a - b)(c + d)ac - ad + bc - bd = ac + ad - bc - bd-ad + bc = -bc + ad-ad - ad = - bc - bc-2ad = -2bcad = bc that is the product of the means equals the product of the extremesa/b = b/c
b+b+b+c+c+c+c =3b+4c