is it appropriate that number and operation be the first standard in the
principles and standards for school mathematics? why or why not?

third option: 6x+8

step-by-step explanation:

we can see that the given question is a sum of series and the values of n vary from 0 to 3

the first term will be:

when n=0, [(0)*x+2] => (0+2) => 2

when n=1, [(1)*x+2] => (x+2) => x+2

when n=2, [(2)*x+2] => 2x+2

when n=4, [(3)*x+2] => 3x+2

so adding up all the terms will give us:

=2+x+2+2x+2+3x+2

=x+2x+3x+2+2+2+2

=6x+8

so,

third option is the correct answer ..

answer: i believe the answer is e

step-by-step explanation:

2 over 5 and 4 over 15

don’t know last one sorry

step-by-step explanation:

42.4 6th grade students prefer hip hop

step-by-step explanation:

40 percent of 106 = 42.4