Answer:
The measure of angle A is ![101\°](https://tex.z-dn.net/?f=101%5C%C2%B0)
Step-by-step explanation:
we know that
Applying the law of cosines
![a^{2} =b^{2}+c^{2}-2(b)(c)cos(A)](https://tex.z-dn.net/?f=a%5E%7B2%7D%20%3Db%5E%7B2%7D%2Bc%5E%7B2%7D-2%28b%29%28c%29cos%28A%29)
substitute the values and solve for cos(A)
![31^{2} =22^{2}+18^{2}-2(22)(18)cos(A)](https://tex.z-dn.net/?f=31%5E%7B2%7D%20%3D22%5E%7B2%7D%2B18%5E%7B2%7D-2%2822%29%2818%29cos%28A%29)
![cos(A)=[22^{2}+18^{2}-31^{2}]/(2(22)(18))\\ \\cos(A)=-0.193182\\ \\A=arccos(-0.193182)=101\°](https://tex.z-dn.net/?f=cos%28A%29%3D%5B22%5E%7B2%7D%2B18%5E%7B2%7D-31%5E%7B2%7D%5D%2F%282%2822%29%2818%29%29%5C%5C%20%5C%5Ccos%28A%29%3D-0.193182%5C%5C%20%5C%5CA%3Darccos%28-0.193182%29%3D101%5C%C2%B0)
Answer:
6(y+1) Hope this helps!!
Step-by-step explanation:
Area of rectangle = Length*width
A = 28 so 28 = 4 * height
height = 28/4 = 7
Answer:
ok
Step-by-step explanation: