Answer:
45%
Step-by-step explanation:
9/20=0.45 (Divide it first), 45/100=45% (45/100 because 100 makes 1 whole -all 20 cards-)
-3(x+2)-7 = 5x + 7
-3x - 6 - 7 = 5x + 7
-3x - 13 = 5x + 7
-20 = 8x
x = -2.5
its all about the angles just subtract the number you have from the total
14 cm
There are 2 equal sides of 13 cm, thus the third side is
third side = perimeter - 13 - 13 = 50 - 26 = 14
