Two lines or equations are described in each part. Decide whether each system has one solution, no solution, or infinitely many
solutions. Show your work AND explain your reasoning for each of your answers.
(a) Line a has a rate of change of 7.
Line b has a rate of change of -7
(b) 2x + 3y = 5.5
4x + 6y = 11
(c) These two graphed lines:
(d) Line c and line d are parallel.
(a) Line a has a rate of change of 7.
Line b has a rate of change of -7
(b) 2x + 3y = 5.5
4x + 6y = 11
(c) These two graphed lines:
(d) Line c and line d are parallel.
1 answer:
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B. (k+10f)(k-5f) you can tell in 2 ways. 1. if the second sign is neg then the signs in the factors are going to be one neg and one positive so that knocks out C and D. Then you look at the second term and since the 5 is positive then the 10 has to be positive so you end up with a positive 5kf.
The second way is to FOIL them out. When you check B you get
combine your like terms and you have your original expression of 
Hope that helps
The second way is to FOIL them out. When you check B you get
Hope that helps
