Answer:
x=9.4
Explanation:
We can use the law of cosines to find the value for x. We need to sides and the included angle. a and b are the sides and C is the included angle
c^2 = a^2 + b^2 − 2ab cos(C)
x^2= 9.2^2 + 11.2^2 -2*9.2*11.2 cos(54)
= 84.64+125.44-206.08cos54
x^2 = 88.9492
Take the square root of each side
sqrt(x^2) = sqrt(88.9492)
x= 9.43129
To one decimal place
x=9.4