Combine the following: a+a+a+b+b+c
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a + a + a is the same as multiplying a by 3 so you would have 3a

b + b is the same as multiplying b by 2 so you would have 2b

Combing everything together you would have the final answer of :

3a + 2b + c

ad = ae + ed = y + 7

similar triangles therefor

ac/ab = ad/ae

6/4 = (y + 7) / y

cross multiply

6y = 4(y + 7)

6y = 4y + 28

2y = 28

y = 14

step-by-step explanation:

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.