What is the solution set to the system of equations

10x+3y=43

-9x-y=-20

a.) (11,1)

b.) (1,11)

c.) (-1,11)

d.) (11,-1)

Question

Mathematics

Francis Rose

7 July, 05:03

What is the solution set to the system of equations

10x+3y=43

-9x-y=-20

a.) (11,1)

b.) (1,11)

c.) (-1,11)

d.) (11,-1)

+5

Answers (1)

Know the Answer?

Aidan Bright · Answer 1

10x+3y=43

-9x-y=-20

From second equation,

y=-9x+20

Substitute third equation into first equation,

10x+3 (-9x+20) = 43

10x-27x+60=43

-17x=43-60

-17x=-17

x=1

y = - 9+20 = 11

Option B

What is the solution set to the system of equations10x+3y=43-9x-y=-20a.) (11,1)b.) (1,11)c.) (-1,11)d.) (11,-1)

What is the solution set to the system of equations

10x+3y=43

-9x-y=-20

a.) (11,1)

b.) (1,11)

c.) (-1,11)

d.) (11,-1)