Answer:
Intersecting lines - One solution
Parallel - No solution
Same lines - Infinite number of solution
Step-by-step explanation:
If the graphs intersect then there is one solution. (Example attached)
If the graphs are parallel(they do not touch) then there is no solution
If the graphs are the same, they will be an infinite number of solutions
9 and 3/8 is 75/8 as a mixed #.
Answer:

Step-by-step explanation:
see the attached figure with letters to better understand the problem
we know that
In the right triangle ABD

In the right triangle BCD

remember that
m< BAD=m<CBD
therefore

equate the equations



Answer:
Step-by-step explanation:
Let's FOIL this out and get it into standard quadratic format:
. The lack of a linear term in the middle means therewas no upwards velocity, consistent with the object being dropped straight down as opposed to thrown up in the air tand then falling in a parabolic path. The -4.9t² represents the acceleration due to gravity, and the 490 represents the height from which the object was dropped. The constant in a quadratic that is modeling parabolic motion always represents the height from which the object was dropped (or launched). That's how you know.