Maria is 7 years older than her brother robert and in 2 years her age will be four times what robert’s age was three years ago. find their present ages.

MARIA=14

ROBERT=7

Step-by-step explanation:

Now

MARIA=X+7

ROBERT=X

In 2 years

MARIA=X+7+2=X+9

ROBERT=X+2

3 years ago

MARIA=X+7-3=X+4

ROBERT=X-3

EQUATION

X+9=4(X-3)

X+9=4x-12

X-X+9=4x-x-12

9=3x-12

3x=21

X=7

ROBERT=7

MARIA=7+7=14

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.

all the angles opposite to the angle 150 would be 150 and all the angles that are next to 150 are 30 because they equal 180 it you add it up.

step-by-step explanation: