Formed by two intersecting lines (all 4) if a pair of vertically opposite angle add up to 236​

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

Xto the second power plus 14x plus 48. what are the factors? we are doing factoring trinomials with a=1

Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?