Iwill mark you !
in this unit you have learned about several different ways to solve quadratic equations. how do you determine which method to use when you’re trying to solve a quadratic equation?

You will use this formula x= -b +

Step-by-step explanation:

4n

so you want to do n to the second power minus and minus 39 equals 0 so you using the quadratic formula

19.side- angle- side

20. angle- side- angle

step-by-step explanation:

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.