Can someone me on these two questions for 86 points and i'll award someone the brainiest

1)   x = 1,   y = 5

2)   x = -7 , y = 21

Step-by-step explanation:

1) 5x + 2y = 13

     x + 2y = 9

5x + 2y - 13 = x + 2y - 9

combine like terms:

5x - x + 2y - 2y - 13 + 9 = 0

4x - 4 = 0

x = 4 / 4

x = 1   plug in x=1 on equation x + 2y = 9

1 + 2y = 9

y = 10 / 2

y = 5

therefore x = 1, y = 5

2)  2x + y = 7

    5x - y = 14

combine like terms:

2x + y -7 - 5x - y - 14 = 0

-3x - 21 = 0

x = 21/-3

x = -7  plug in x=-7 on equation 2x + y = 7

2(-7) + y = 7

-14 + y = 7

y = 7 + 14

y = 21

therefore x = -7 , y = 21

answer: since the question is talking about growth you have to use the growth formula which is inital amount (1 + growth)^time

step-by-step explanation:

the intial amount is 1200, the growth is 4.8, and the time is 7. plug those numbers into the equation, also i think you have to change 4.8 into a percent. but, i have forgotton how to do that. if this is a online class go on to the lesson.

y=3n + 1

step-by-step explanation:

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