Solve each system of equations by using either substitution or elimination.
10m - 9n = 15
5m - 4n = 10
a.
(6, 5)
c.
(4, -3)
b.
(-8, -3)
d.
no solution

option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.

x=30

step-by-step explanation: