Answer:
answer: 10 and 9
10+9 = 19
10×9 = 90
9
Step-by-step explanation:
Equation 1:
x + y = 19
x = 19 - y
Equation 2:
xy = 90
Substitute Equation 1 to Equation 2:
(19-y)(y) = 90
19y - y^2 = 90
y^2 - 19y + 90 = 0
(y - 10) (y - 9) = 0
Therefore,
y = 10 and y = 9
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Answer:
answer: 10 and 9
10+9 = 19
10×9 = 90
Answer:
9
Step-by-step explanation:
Equation 1:
x + y = 19
x = 19 - y
Equation 2:
xy = 90
Substitute Equation 1 to Equation 2:
(19-y)(y) = 90
19y - y^2 = 90
y^2 - 19y + 90 = 0
(y - 10) (y - 9) = 0
Therefore,
y = 10 and y = 9