4. F
To write a linear equation in standard form, move each variable term to the left side of the equation and simplify.
Ax+By=C
Move -2x to the left side of the equation because it contains a variable.
y+1+2x=-3
Move all terms not containing a variable to the right side of the equation.
y+2x=-4
Reorder y and 2x
2x+y=-4
5. C
5x-20=0
Add 20 to both sides of the equation
5x=20
Divide each term by 5 and simplify
x=4
6. H
-7,-3,1,5,...
This is an arithmetic sequence since there is a common difference between each term. In this case, adding 4 to the previous term in the sequence gives the next term. In other words,
an=a1+d(n-1)
Arithmetic sequence: d=4
