Can someone please answer this question please I need it today please answer it correctly and please show work please answer numbers 7and22

7)  B

22) B

Step-by-step explanation:

7)    -4n

The expression must have a negative value

Use three types of examples for n

-4(-1)        -4(0)          -4(1)

 4               0              -4  

Only one of these examples results in a negative number, 1.

1 > 0

Substitute n back into the inequality

n > 0              B

22)   Use two numbers greater than 0 to represent m and n

ex.) m = 1    n = 2

= = -0.5

-0.5 is a rational, negative number.   B

Hope this helps :)

y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.