Given x + 6 + 3(x + 4) Step 1: x + 9(x + 4) Step 2: x + 9x + 36 Step 3: 10x + 36 which step did she make a mistake

She made mistake in step 1.

Step-by-step explanation:

she should have done:

x + 6 + 3x + 12

4x + 18

false

step-by-step explanation:

false.   two legs of the trapezoid would be congruent, but the other two would not.   were all the legs congruent, then we'd have a square; were the 2 shorter sides congruent and the 2 longer sides also congruent, we'd have a rectangle.