Answer: -12
Step-by-step explanation: because -7- 5= -12
Answer:
66
Step-by-step explanation:
Use the combination formula.
Answer: The value of x is 28.
Step-by-step explanation:
Since line m is parallel to line l.
So, we assume that
(3x+21)° and (4x-7)° are corresponding angles.
And we know that , corresponding angles formed when a transversal cut the parallel line are equal.
So, they must be equal to each other.

Hence, the value of x is 28.
There is no diagram, so you should guess C. C is the most likely to be chosen as an answer.