Liwen and celina shared some plants in a ratio of 5: 6. celina decided to give liwen 2/3 of her plants, which left her with 21 fewer plants than liwen. how many plants do they have altogether?

231

Explanation:

Liwen    Celina

   5x          6x

5x - 21 = 6x

5x - 21 = 4x

-4x +21   -4x +21

  x        =        21

Liwen: 5x   = 5(21)   = 105

Celina: 6x   = 6(21)   = 126

                       Total:   231                    

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

%40

step-by-step explanation: