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azamat
2 years ago
12

7th grade math. Easy but hard for me

Mathematics
2 answers:
alekssr [168]2 years ago
8 0
Feel free to ask me if you didn't understand a part

vivado [14]2 years ago
6 0

Answer:

∠YDC = 140°

∠FAB = 75°

Step-by-step explanation:

17)
The equation

13x-3=55+3x+2

13x-3x=55+2+3

10x=60\\x=60/10=6

∠FAB = 13(6) - 3 = 78 - 3 = 75°

18)

The equation

15x+5=80+6x+6

15x-6x=80+6-5

9x=81\\x=81/9=9

∠YDC = 15(9)+5 = 135 + 5 = 140°

Hope this helps

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