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Dvinal [7]
3 years ago
5

What are the sulotions of the equation ×2+8×+15=0​

Mathematics
1 answer:
Valentin [98]3 years ago
7 0

Answer:

x=-3/2

Step-by-step explanation:

2x+8x+15=0

10x+15=0

10x=-15

x=-3/2

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Amy is 9 years older than her younger sister. if her younger sister is now 1 year old, how many years later will Amy be 4 times
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<h3><u>A</u><u>n</u><u>s</u><u>w</u><u>e</u><u>r</u><u>:</u><u>-</u></h3>

  • Age of Amy's younger sister=1year

☆Amy is 9 years older than her younger sister.

\\ \sf\longmapsto Age\:of\:Amy=1+9=10years

Let after x years Amy will be 4times old as her sister.

ATQ

\\ \sf\longmapsto \dfrac{1+x}{9+x}=\dfrac{1}{4}

  • Using cross multiplication

\\ \sf\longmapsto 4(1+x)=1(9+x)

\\ \sf\longmapsto 4+4x=9+x

\\ \sf\longmapsto 4x-x=9-4

\\ \sf\longmapsto 3x=5

\\ \sf\longmapsto x=\dfrac{5}{3}

\\ \sf\longmapsto x=1.6

\\ \sf\longmapsto x=2(approx)

5 0
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