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aivan3 [116]
3 years ago
9

Please help confused tyy​

Mathematics
2 answers:
Greeley [361]3 years ago
5 0
D=9

You want to set the angles equal to 90°
So it would look like this

(6d+8)+(3x+1)=90

then you would solve

Hope this helps ;)
serg [7]3 years ago
5 0
Answer: d=9

(3d+1)+(6d+8)=90
3d+1+6d+8=90
9d+9=90
-9 -9
9d=81
divide by 9 on both sides
d=9

Explanation: In order to solve for d, you will need to remove the parentheses, then combine like variables. Then, subtract 9 from both sides. Finally, divide by 9 on both sides. You should get d=9.
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