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JulsSmile [24]
2 years ago
6

Please answer #7 <3 tysm if u can explain why i’ll give u brainlist

Mathematics
2 answers:
rjkz [21]2 years ago
4 0

Answer:

Bc = 2

Step-by-step explanation:

Just add AB + CD

you'll get 19

substract it from AD

21 - 19 = 2

In Above question b = 39°

Not 31

ElenaW [278]2 years ago
3 0

Answer:

BC=2

Step-by-step explanation:

The equation is

AB+BC+CD=21

7+BC+12=21

19+BC=21

BC=21-19

BC=2

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(a) Yes, the sum of two polynomials is again a polynomial. For example,

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