What is this answer i dont know i need to acheve a grade 4 for my mathwatch test

n+7

Step-by-step explanation:

5+7=12

12+7=19

19+7=26

26+7=33

ETC...

7n-2

Step-by-step explanation:

First you need to see by how much the sequence progresses each time, and this is 7.

So you write 7n.

Next you look at the first term of the sequence, which is 5 here and you need to go from 7 to 5.

You minus 2 to go from 7 to 5, therefore the expression would be 7n-2.

3. parallelogram

step-by-step explanation:

we turn each of our sides into direction vectors

ab=b-a=(3 - 7, 1 - 0) = (-4, 1)

bc=c-b=(1,6)

cd=d-c=(4,-1)

da=a-d=(-1,-6)

we see how the opposite sides have negated direction vectors; this is characteristic of a parallelogram.   we have congruent sides ab=cd and bc=da with unequal lengths because 1^2+6^2 is different from (-4)^2+1^2.   so it's not a square or a rhombus.  

we check the dot product of direction vectors of adjacent sides.   we have

ab dot bc = -4(1) + 1(6) = 2

that's not zero so the sides are not perpendicular.   we've ruled out rectangle.

the direction vectors indicate two pairs of congruent parallel sides, so we choose parallelogram over trapezoid.