((Topic: surface Area/Volume)) hey besties anyone willing to help w these five questions? I’m giving out brainliest ! <3

What is sin 7x/4 ? i need on this urgent trig

Select the quadratic that has root x = 8 and x = -5

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.