So what you do is distribute the invisible -1 in front of the second parenthasees set and add like terms
remember
x^2+3x^2=4x^2
-(3+4x-x^2)=-1(3x+4x-x^2)=-3-4x+x^2
so first distribute the negative 1
-1(-4f^2-3f+6)=4f^2+3f-6
add
12f^2-9f+15+4f+3f-6
group like terms
12f^2+4f^2-9f+3f+15-6
add
16f^2-6f+9
aswer is 16f^2-6f+9
Answer:
∠ A ≈ 48°
Step-by-step explanation:
Using the Cosine rule to find an angle
cosA = 
with a = 10, b = 13 and c = 11
cosA = 
= 
= 
, thus
A = 
( ) ≈ 48° ( to the nearest degree )
Answer:
<u><em>12</em></u>
Step-by-step explanation:
Add 50% of 16 to 16, 50% of 16 is 0.5 * 16 = 8, 16 + 8 = 24
Multiply 24 by 50%, or 0.5 to get 12
Factor : 8y - 36
Go through all of the answer choices & see which one is correct.
a) -4 (2y + 9)
You don't even have to fully simplify this, just by looking at the -4, you already know that this is incorrect because you need to have a positive 8. So, A is incorrect.
b) 8 (y - 4)
Simplify.
8y - 32
Incorrect because it is not equal to the original equation.
c) 2 (4y - 18)
Simplify.
8y - 36
Correct answer because it is equal to the original equation.
d) 4(2y - 9)
Simplify.
8y - 36
D is also correct.
So, your answer is : (C) and (D) are your answers.
~Hope I helped!~
