7. What is the length of XY

A 2
C 120
B 90
D 10

D - 10

Step-by-step explanation:

15x - 30 = 10x + 20

15x = 10x + 50

5x = 50

x = 10

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.

y=3n + 1

step-by-step explanation:

this is wrong because it says the second number is one less and i added one instead