Answer:
hey hun, I think u need to give us more information on the question. Is that the full question ??
Step-by-step explanation:
2^2=1.75^2+3^2-2*3*1.75cos x
4=3.0625+9-10.5 cosx
10.5cos x=9-4+3.0625
10.5cosx=8.0625
cos x= 8.0625/10.5≈0.77
x≈40 degrees
56:7 = 8
I'm not good with math, sorry