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olga55 [171]
3 years ago
12

The largest telescope in the world is powerful enough to identify a penny that is 5 miles away. How many yards is this?

Mathematics
1 answer:
mojhsa [17]3 years ago
3 0

We are given

The largest telescope in the world is powerful enough to identify a penny that is 5 miles away

it means that

distance =5 miles

we can change it into yards

we know that

1 mile=1760 yards

d=5\times 1mile

we can replace 1 mile

d=5\times 1760 yards

d=8800 yards

So, distance in yards is 8800 yards..........Answer

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15-2x=-7x what does x equal
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Answer:

x = -3

Step-by-step explanation:

15 - 2x = -7x

add 2x

15 = -5x

divide by -5

-3 = x

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(08.02)a pair of equations is shown below. 3x − y = 9 y = −2x + 11 if the two equations are graphed, at what point do the lines
mixas84 [53]
3x - y = 9
y = -2x + 11

3x - (-2x + 11) = 9
3x + 2x - 11 = 9
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y = -2x + 11
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almond37 [142]
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How would you go about finding the solution to this system of three equations in three variables? Be specific. For example, you
kupik [55]
I:2x – y + z = 7
II:x + 2y – 5z = -1
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you can first use III and substitute x or y to eliminate it in I and II (in this case x):
III: x=6+y
-> substitute x in I and II:
I': 2*(6+y)-y+z=7
12+2y-y+z=7
y+z=-5

II':(6+y)+2y-5z=-1
3y+6-5z=-1
3y-5z=-7

then you can subtract II' from 3*I' to eliminate y:
3*I'=3y+3z=-15

3*I'-II':
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z=-1

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3y-5z=-7
3y+5=-7
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y=-4

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x-(-4)=6
x+4=6
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so the solution is
x=2
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3 0
3 years ago
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