Question 1 what is the solution set for x + 6 > 2? {x: x > -8} {x: x > -4} {x: x > 4} {x: x > 8} question 13 how many solutions does the system 9x+y=3 over 9x-y=7 have? infinitely many none one none of the above question 17 solve the system 2x+3y=5 over 3x+2y=0 by substitution. (2, 3) (3, 2) (3, -2) (-2, 3)

QUESTION 1

•

Step 1 ) Subtract 6 from both sides.

x + 6 > 2

x + 6 - 6 > 2 - 6

x > -4

So, the best solution to the equation x + 6 > 2 would be...

B ) x > -4

•

QUESTION 13

•

Solved using matrix.

•

Step 1 ) Rewrite as matrix.

Step 2 ) Do Row2 - Row1 and put the value as the new row2.

Step 3 ) Simplify.

Step 4 ) Do Row1 - Row2 and put the value as the new Row1.

Step 5 ) Simplify.

So, since the solution is x equals 5 over 9 and y equals -2, the amount of solutions is...

C ) One

•

QUESTION 17

•

Step 1 ) Solve for x in 2x - 3y = 5.

2x - 3y = 5

2x - 3y + 3y = 5 + 3y

2x = 5 + 3y

Step 2 ) Place the value of x into 3x - 2y = 0.

3x - 2y = 0

3 ×

Step 3 ) Solve for y in the new equation.

3 ( 5 + 3y ) - 4y = 0

15 + 9y - 4y = 0

15 + 5y = 0

5y = -15

y = -3

Step 3 ) Place the value of y into the value of x.

x = -2

So, in 2x - 3y = 5 ; 3x - 2y = 0...

x = -2; y = -3

•

•

- Marlon Nunez

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.

my guess is

step-by-step explanation: