Use the substitute method to solve the system of equations. 3x+y=10 y=2x a. (-2,4) b. (2,-4) c. (2,4) d. (4,2)

C

Step-by-step explanation:

plug in y = 2x into the first equation

3x+2x = 10

5x = 10

x = 2

put it into the second equation because its easier

y = 2(2)

y = 4

(2, 4)

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.