Please help. i dont get this at all.

coa=90

cob=23

bda=274

ea=90

abe=157

de=90

ce=180

Step-by-step explanation:

for coa it's a 90 dagree angle  

for cob= it's 23 90-67=23

for bda= you take the half and see that it's 180 so you add 180 and 67 and get 274 because a whole circle is 360degrees

for ea again it's 90 degrees

for abe it's the 180 again

for de it's the 90 again

for ce it's just half a circle so it's 180

351.23

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.