Somone help and show me how u got it please

29.7

Step-by-step explanation:

Right now you have three values:

a=45

c=23

B=36°

(note: a side is opposite of its corresponding angle in a triangle)

Since you need to find b and you have the other 2 sides and b’s corresponding angle, you use the law of cosines. The formula law of cosines, in this problem, will be:

b^2 = (a^2) + (c^2) - 2ac(cosB)

Now you just substitue in your values:

b^2 = (45^2) + (23^2) - 2(45)(23)(cos 36°)

Simplify the equation:

b^2 = 2025 + 529 - 2070(cos36°)

b^2 = 2554 - 1674.6652

b^2 = 879.3348

Now you take the square root so you can get rid of the square on b:

b = 29.7 (rounded to the nearest tenth)

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step-by-step explanation:

12

step-by-step explanation:

12 + 5 = 17

12x2=24

24-7=17