Question

#1 Please help solve this

Answer 1

For each pair (x,y) we check 5x-4y and if it's 17 we check YES otherwise NO.

(2,9)         5(2) - 4(9) = 10 - 36 = -26  NO

(-3,-8)       5(-3) - 4(-8) = -15 + 32 = 17  YES

(1,-3)         5(1) - 4(-3) = 5 + 12 = 17   YES

(-6,2)        5(-6) - 4(2) = -30 - 8 = -38  NO

Answer 2

Answer:

(2, 9) ................NO

(-3 , -8) ............YES

(1, -3) ...............YES

(-6, 2) ...............NO

Step-by-step explanation:

5x - 4y = 17

To check if a particular number is a solution, just substitute the value of x and y.

i. (2,9)

5x - 4y = 17

5*2 - 4*9 =

10 - 36 ≠ 17 (NOT A SOLUTION)

ii. (-3, -8)

5x - 4y = 17

5*-3 - 4*-8 =

-15 + 32 = 17. (A SOLUTION)

iii. (1, -3)

5x - 4y = 27

5*1 - 4*-3 =

5 + 12 = 17. (A SOLUTION)

iv. (-6, 2)

5x - 4y= 17

5*-6 - 4*2 =

-30 - 12 ≠ 17. (NOT A SOLUTION)

Math is truly fun