11. Mary lives in a town that has 3 school buildings, Each building has 90 large classtooms and 5 small dassrooms.
Which expression could Mary use to find out the total number of classrooms in the 3 school buildings?
A
(3 x 90) + (3 x 5)
B.
(3 + 90) + (3+5)
С
(90 x 3) + (90 x 5)
D
(90 +5) + (90+3)
6 7 8
9

a

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.