Answer:
M=3+2C
Step-by-step explanation:
Let M be Melanie's age
Let C be Crystal's age
Twice Crystal's age =2C
3 years more than twice crystal's age =3+2C
Therefore, the expression would be ;
M=3 +2C
Step-by-step explanation:
2x+98=180° (angles in straight line )
2x=180-98
x=2/2
x=1
To complete the square, the second degree term must have a coefficient of 1.
Since the second degree term here has a coefficient of 4, we start by dividing each term on both sides by 4.



Now we can complete the square.
First, we need to find what number completes the square.
We take the coefficient of the first degree term, -7 in this case.
Divide it by 2 and square it. -7 divided by 2 is the fraction -7/2.
Now we square -7/2 to get 49/4.
We add 49/4 to both sides.



For this case we must factor the following expression:

We must find two numbers that, when multiplied, result in 9 and when added, result in -6.
These numbers are -3 and -3.

Then, the factored expression is of the form:

Thus, the correct option is option C.
ANswer:
Option C