Question

Find the value of b.

Answer 1

@marissalovescats

Answer 2

Use the Cosine Law.

http://www.mathsisfun.com/algebra/trig-cosine-law.html

Answer 3

and then what?

Answer 4

Yes use it to find b

b^2=a^2+c^2-2(a)(c)CosB

Answer 5

b^2=6.5^2+8^2-2(6.5)(8)Cos37

Answer 6

what would i do next?

Answer 7

You plug in the associated numbers and evaluate the result.

Answer 8

ok i got b=12.4

Answer 9

@robtobey @marissalovescats is that right?

Answer 10

I got 23.2

Answer 11

ok thanks :)

Answer 12

You're welcome

Answer 13

\[b^2=23.192,\text{ }b=\sqrt{23.192}=4.816 \]

Answer 14

I forgot to square root it lol sorry.