Answer:
fourth option
Step-by-step explanation:
note that (
)(x)x) = 
=
← factorise numerator/ denominator
=
← cancel the common factor (2x + 1)
=
where x ≠ 0, - 
Answer:
320
Step-by-step explanation:
80*4
Answer:
9
Step-by-step explanation:
a^2 + b^2 = h^2
15^2= 12^2 + b^2
225=144+b^2
81=b^2
9
1) Mean Absolute Deviation = 1.75
2) Mean = 244