Solve this system of equations:
x = 2y - 8
4x + y = 13
A. (2,-5)
B. (-2,5)
C. (-2,-5)
D. (2,5)

Step-by-step explanation:

4(2y -8) + y = 13

8y - 32 + y = 13

9y - 32 = 13

9y = 45

y = 5

x = 2(5) - 8

x = 10 - 8

x = 2

(2, 5)

i used to know how to do this in 7th but i forget easily

step-by-step explanation:

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2