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anonymous
 one year ago
Solve the following system.
x 2 + y 2 = 25
2x + y = 10
The solution set {(________,__________,_________,________)}
anonymous
 one year ago
Solve the following system. x 2 + y 2 = 25 2x + y = 10 The solution set {(________,__________,_________,________)}

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0but how would you do that i only got 2

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0use the substitution method from the second equation y = 10  2x Now replace y in the first equation by 102x to get an equation in x only solve this for x ( there will be 2 values of x)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0this is what i got 2x+y=10;2x+2y=25 Step: Solve 2x+y=10 for y: 2x+y+−2x=10+−2x(Add 2x to both sides) y=−2x+10 Step: Substitute (−2x+10) for y in 2x+2y=25: 2x+2y=25 2x+2(−2x+10)=25 −2x+20=25(Simplify both sides of the equation) −2x+20+−20=25+−20(Add 20 to both sides) −2x=5 −2x−2=5−2(Divide both sides by 2) x=−52 Step: Substitute (−52) for x in y=−2x+10: y=−2x+10 y=−2(−52)+10 y=15(Simplify both sides of the equation) Answer: y=15 and x=−52

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0you can then find the corresponding values of y by substituting back in equation 2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so can you solve this for me please and then explain after

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0do you follow my method?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Not really but please can you do it and explain?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.02x + y = 10 subtract 2x from both sides y = 10  2x OK with that?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0right x^2 + y^2 = 25 replace the y in the above equation by 10  2x: x^2 + (10 2x)^2 = 25 x^2 + (10  2x)(10  2x) = 25 expanding the brackets: x^2 + 100 20x20x + 4x^2 = 25 adding like terms 5x^2  40x + 100 = 25 5x^2  40x + 75 = 0

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0so now we need to solve this quadratic you can make it easier by dividing each term by 5: giving x^2 8x + 15 = 0

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0can you solve this? you need to factor first you need 2 numbers whose product is 15 and when added = 8

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0just do it foe me sir i have limited time

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0(x  3)(x  5) = 0 x = 3 or 5 now plug x=3 into the second equation 2x + y = 10 and find y then do the same for x = 5 and you have your 4 solutions

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i dont have a calculator

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0you dont need one to these

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i got 4,8,10 and 12 is that correct

welshfella
 one year ago
Best ResponseYou've already chosen the best response.02(3) + y = 10 6 + y = 10 y = ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0if not what are they

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0if already got 2 values of x : 3 and 5 now we need values of y

welshfella
 one year ago
Best ResponseYou've already chosen the best response.06 + y = 10 y = ? i'm sure you can do that

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0right now plug in x = 5 to find the second value of y

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0he has the answers now

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0yes but pair them up ( x,y) (5,0) and (3,4)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0but i have 4 answer boxes?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0well enter then as 5 0 3 4

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0look at the flick of the wrist
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