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the sum of 2 numbers is 25. and their difference is 7. find the number.
 one year ago
 one year ago
the sum of 2 numbers is 25. and their difference is 7. find the number.
 one year ago
 one year ago

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LukeBlueFiveBest ResponseYou've already chosen the best response.2
This is equivalent to the following series of equations: \[x + y = 25\] \[x = y  7\] So, substitute the second equation into the first: \[(y  7) + y = 25\] Simplify, and you'll have y. Then, plug that value of y into the second equation to get x.
 one year ago

pkjha3105Best ResponseYou've already chosen the best response.1
x+y=25 xy=7....on solvng.. x=16,y=9
 one year ago

babystar16Best ResponseYou've already chosen the best response.0
ok got a new question
 one year ago

babystar16Best ResponseYou've already chosen the best response.0
the length of a rectangle is 5 more than twice the width. the permiter is 130 in. what is the area
 one year ago

pkjha3105Best ResponseYou've already chosen the best response.1
5b+b=130 bredth=21.6 length=108.4
 one year ago

pkjha3105Best ResponseYou've already chosen the best response.1
sory...b=10.8 i=54.2 area=587
 one year ago

LukeBlueFiveBest ResponseYou've already chosen the best response.2
This equation gives the perimeter of a rectangle: \[2 \times length + 2 \times width\] In this case, the following is true as well: \[length = 2 \times width + 5\] Substitute this into the first equation and solve like the previous problem.
 one year ago

LukeBlueFiveBest ResponseYou've already chosen the best response.2
Then multiply the length times the width to get the area, since: \[Area = length \times width\] Gives the area of a rectangle.
 one year ago

pkjha3105Best ResponseYou've already chosen the best response.1
hey u got the sol @babystar 16
 one year ago
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