The answer is y-5. 1 to any power is still 1. Multiply any number by 1 is still the number. So the 1-4 can simply be cancelled out. That leaves y3-8. 3-8 is -5.
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1) x*y=315 2) x+y=52 from 2, x=52-y, put into 1, y*(52-y) = 315 or y^2-52*y+315=0 delta= (-52)^2-4*1*315=1444 = 38^2 y = (52-38)/2 = 7 or y = (52+38)/2 = 45 then x = 45 or x = 45
32
x+y=154x+3y=384x+4y=604x+3y=38(4x+4y=60)-(4x+3y=38)-->(4x-4x+4y-3y=60-38)-->(0x+1y=22)-->[since 0x=0](1y[y]=22)given y=22and x+y=15x+22=15x=15-22=-7therefore ANSWER KEYX=-7 Y=22Checking answers4x+3y=38-28+66=38THEREFOREThis is correctIf you have problems please write a message on Its Me Ue's message board
a) x+y = 100 b) x-y = 24 a+b: x+x+y-y=100+24 2x=124 x=62 substitute x=62 into equation a) y=100-62 y=38 the two numbers are 38 and 62
-38