When abcd is drawn to scale, would the lines ad and bc be parallel or not? you must justify your answer without using a scale drawing.

a = 2x degrees
b = 90 degrees
c = x degrees
d = 3x degrees

  yes, they are parallel

Step-by-step explanation:

The sum of angles in a quadrilateral is 360°, so ...

  2x + 90 + x + 3x = 360

  6x = 270 . . . . . subtract 90

  2x = 90 . . . . . . divide by 3

Then angles A and B are both 90°, meaning sides AD and BC are parallel.

The same-side interior angles at transversal AB between lines AD and BC are supplementary, so the crossed lines (AD and BC) are parallel.

i used to know how to do this in 7th but i forget easily

step-by-step explanation:

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour