18. remove the parentheses from the following expression, and combine like terms: (a + b – c) + 3a – 2c a. 4a + b + 3c b. 4a + b – 3c c. 2a – b – c d. 2a – b + c

For this case we have the following expression:

We eliminate parentheses:

We add similar terms:

We have that equal signs are added and the same sign is placed, while different signs are subtracted and the sign of the major is placed, then:

Option B

point a is the center of this circle.

the ratio of the lengths of (ef/bc) and (ad/ih) is 2: 1.

step-by-step explanation:

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