ladybugys
04.02.2021 •
Mathematics
What is the ratio of a : b, knowing that a — b = 3 and a + b = 5
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Ответ:
Explanation:
4 - 1 = 3
4 + 1 = 5
Ответ:
y-y1=slope (x-x1)
where x1=-5, y1=-7 and the slope=2÷5
we substitute for x and y
y-(-7)=2÷5{x-(-5)}
y+7=2÷5(x+5)
y+7=(2x+10)÷5 cross multiply
5y+35=2x+10 collect like terms
5y=2x+10-35
5y=2x-25 ans