What would you assume at the beginning of an indirect proof for the following?
a number that is divisible only by itself and 1 is a prime number. 51 is not a prime number.

a. 51 is a prime number.
b. 51 is not a prime number.
c. prime numbers are not divisible by themselves and 1.
d. 51 is not divisible by itself and 1.

I would assume that it is not a prime number as it seems to be divisible by 3.

so a parallelogram is just like a square base times height. multiply 40 and 39 to get 1560 inches.

a triangle is base times height divided by two. so multiply 7.9 and 5 and then divide it by 2 to get 19.75inches.

the kite can be split into two separate triangles and added together to get the total area. 30 x 4 /2 which equals 60. make sure to double it for the two triangles making 120.

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.