Y = 2x + 1
y = 2(-1) + 1
y= -2 + 1
y= -1
21 students because if 6 represents 30% u add 6 two more time which equals 18 and 90% then u add 3 more because it is half of 6. when u add 3 more u will get 21 and 100%
4+3(7+4 x 2)-100
4+3(7+8)-100
4+3(15)-100
4+45-100=
-51
I think the answer to you question is 35 i might be wrong tho but it may work.
Subtracting a negative is the same as adding it.
4-(-3)=4+3=7
