Plzzz help again Plz plz plz 15 points

A ≈ 1.72 cm²

Step-by-step explanation:

(a). Area of the rectangle: 4 × 2 = 8 cm²

Area of the circles: 2πr² ≈ 6.28 cm²

r = 1 cm

(b). A of the six yellow sections: 8 - 6.28 ≈ 1.72 cm²

f is the midpoint of

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18