Simplify. [3 • (3 – 9)] + 9 –4.5 9 45 –9

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

answer: its the third option.

step-by-step explanation:

i just took the test.

final total: 63

step-by-step explanation:

60 times sales tax

60 times 0.05

3

60 + 3

63