Please someone useful help me it's always people who answer who say they don't know the answer

Step-by-step explanation:

the equation is  3-8*cos(x) = 7

plugging in 45°  to Cos  give   / 2

then the equations looks like

3-8* ( / 2)  = y

3-4  = y  

there is your answer... don't get rid of the square root.. that's an exact answer

okay so 15.15 *()5: +5/6

step-by-step explanation:

a

step-by-step explanation:

strong negative correlation