Two more than 3 times a number is 20. find the number.

n=6

Step-by-step explanation:

The equation to solve this would be 3n+2=20.

3n+2=20

3n+2-2=20-2

3n=18

3n÷3=18÷3

n=6

d) -1

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