If x4 + 1/x4 = 4 find the value of x2+1/x2​

Classify the following triangle check all that apply

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Evaluate cos2θ for cosθ = square root of 3/2