Factorise 9(a+b)^2 + (a+b) -8

Which value is not a solution of 8x^3 – 1 = 0

Angle that produces maximum distance

The first week samantha learned to read braille, she could read 10 words per minute. in the second week she increased her speed by 20%. in the third week she increased her speed again by another 25%. how many words could she read per minute by the third week? hurry and tell me!