3x - y = 9
-2x -y = -11 |* -1
3x - y = 9 } +
2x+y = 11
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5x / =20
x=20:5
x=4
3x -y = 9
3*4 - y = 9
12 - y= 9
y=12-9
y=3
(4,3) is the solution
Answer: Which math quiz and what problems?
Step-by-step explanation:
X = number of days it would take Kate to paint the house by herself. .
<span>x+5 = number of days it would take Jean to paint the house by herself.</span>
<span>Together, they paint the house in 6 days: </span>
<span>1/x + 1/(x+5) = 1/6 </span>
<span>Multiply both sides by 6x(x+5) </span>
<span>6(x+5) + 6x = x(x+5) </span>
<span>12x + 30 = x^2 + 5x </span>
<span>x^2 − 7x − 30 = 0
</span>therefore the answer is A.
Answer:
1 and 5. First and the last one
Step-by-step explanation:
i just took the ed test.
