Should be C. 1/19. because if there's 20 maebles in the bag and without replacing the marble then it actually would be 2/18
Formula for trapezoid area is A=b1+b2 x heightx 1/2 so your answer would be 161m squared
The answer to 14 is 13 as in the number not the question
and 13 I'm not so sure
The square root of 81 is 9. Therefore, the positive square root of 81 is positive 9.
Hope this helps!
Dude there is an app called photo math and it might help you :) it definitely helped me pass