the course of an enemy submarine as plotted on a set rectangular axes is 2x+3y=5 .on the same axes, the course of the destroyers is indicated by x-y=10.the point (x,y) at which the submarine can be destroyed is......?
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Answer:
(7,-3)
Step-by-step explanation: 2x + 3y=5 .......1
x-y=10 .......2
x=y+10
using in equation 1 , we get
2(y+10) +3y =5
2y+20+3y=5
5y+20=5
5(y+4)=5
y+4=1
y=-3
using y=-3 in equation 2
x-y=10
x=y+10
x= (-3)+10
x=7
therefore , the submarine can be destroyed at (7,-3)