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Svetllana [295]
3 years ago
6

Choose the solutions to the two equation system.6.0 + 3y = 3015+ y = 7​

Mathematics
1 answer:
zloy xaker [14]3 years ago
3 0

Answer:

y= -8 or 8

Step-by-step explanation

30-6= 24

24/3=8

y=8

15+y=7

y=-8

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5 0
3 years ago
You have a fishing line spool with an end that has an area of 20.0 cm2. how much fishing line do you need to wind around the spo
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Answer: 158.53 cm

Step-by-step explanation:

We know that the ends of a fishing line spool are circular in shape.

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Area of a circle = \pi r^2                                (2)

Circumference of a circle = 2\pi r                           (3)

, where r is radius of the circle.

From (1) and (2), we have

\pi r^2=20\\\\\Rightarrow\ r^2=\dfrac{20}{\pi}\\\\\Rightarrow\ r=\sqrt{\dfrac{20}{\pi}}                

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=2\pi \sqrt{\dfrac{20}{\pi}}=2\sqrt{20\pi}=2\times2\sqrt{5\pi}=4\sqrt{5\pi}

i.e. Fishing spool required to wind around the spool one time =4\sqrt{5\pi}\ cm

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7 0
3 years ago
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