Add the two expressions 3w + 4 and 3w - 9

3w+4 nothing can be done

All together the expression would look like (3w+4) + (3w-9). Since you can add like numbers, 3w, 3w+3w would be 6w. Then, -9 + 4 is -5. So, now you have your two sums, 6w and -5. So, the sum of the two expressions would be (6w - 5)

In the first triangle 80+20+p=180 (since sum of all angles of a triangle is 180)so p= 80also in second triangle 55+45+q=180 (since sum of all angles of a triangle is 180)so q=80so we can conclude that p=80 degrees q=80 degrees so p=q=80 degreeshence option b is correct

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