13 - 8m = 21
por favor ayuda

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.