The rule for deriving a multiplication is
Also, we can forget about the factor 4 for now, since we have
So, we will just multiply everything by 4 at the end. Our functions are
For both derivatives we will use the rule
So, we have
We can simplify those expression a little bit:
The formula thus becomes
And so the final answer is
If you simplify this expression by factoring common terms, you will see that the correct answer is the first one.
Answer:
B) 81°
Step-by-step explanation:
Given:
From the figure given below,
∠1 = 3x + 18
∠7 = 2x + 39
∠1 and ∠7 are a pair of exterior alternate angles. For two parallel lines l and m, cut by a transversal n, the pair of exterior alternate angles are congruent to each other.
Therefore, the angles 1 and 7 are congruent to each other. This gives,
∠1 ≅ ∠7
Therefore, the value of 'x' is 21.
Now, the measure of angle 7 can be calculated by plugging in the value of 'x' in the expression for angle 7. This gives,
Therefore, the correct option is option (B).
