Prove that cos^2A+COSx^{2} A+sinx^{2} Bcos2A = sinx^{2} B+cosx^{2} Acos2B

What is the value of x in the this question ?

X+ y = 5 ; x - y =3 solve using linear combination

Create a question with this scenario you could ask that could be answered only by graphing or using logarithm. david estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x.