The answer is B I agree with him/her
It might be 64 but I’m not entirely sure on that.
1/25
think of it as 4/100
4 goes into 100 4 times
1/25+1/25+1/25+1/25=4/100
27x^2-81x-9x+27 In this case, just in your mind multiply 27 (coefficient of x^2) by the constant value 27(the end value of the quadratic trinomial). Then find factors that give you the value -90 when you add and 729 (27*27) when you multiply.
Factorise the values
27x( x-3)-9(x-3)
Which will give you
(27x-9)(x-3)
If the two points of a line segment are A and B, you write it as AB with a straight line over the top. -----
AB
If the two points of a line are A and B, you write it as AB with a double sided arrow over the top. <----->
AB
If the two points of a ray are A and B, you write it as AB with a one sided arrow over the top (the side with the arrow depends on which way the ray is pointing)
Either: <----- ------>
AB OR AB
