Pls help i don’t understand

r + 7 is a factor.

Step-by-step explanation:

You have to divide by r + 7.  If the remainder is 0, then r + 7 is a factor of  .

I did that and the remainder was 0.

So, yes, r + 7 is a factor.  

You will need to learn how to do that division in order to solve this problem.  OK?  

option 2 is correct.

step-by-step explanation:

we are given two inequality equation

x+y> 5 and -3x+2y< -2

first we draw the graph of both function using t-table method

equation: x+y> 5

for x=0, y=5

for x=-5, y=0

table:

x   :   0     5

y   :   5     0

test point (0,0) , 0> 5

false

equation: -3x+2y< -2

for x=0, y=-1

for x=2, y=4

table:

x   :   0     2

y   : -1       4

test point (0,0) , 0< -2

true

now we draw the graph. see the attachment for graph.

common region would be solution set.

option 2 is correct.