Expand (i) (x - 2/x + 3/x²)²
(ii) ( x + 3y + 4z)(x - 3y + 4z)​

Measures of the angle of r, 31 s (x+4) t (3x+9)

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)

If the segment op is dilated by a scale factor r=2, what is the length of segment op? a)10cm b)16cm c)6cm d)4cm