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skad [1K]
3 years ago
13

Last week, Bill ran 900 meters on each of 3 days. Between last week and this week, bill wants to run a total of 6 kilometers. Ho

w far does bill need to run this week?
A. 4.7 kilometers
B. 2.7 kilometers
C. 3.3 kilometers
D. 2.3 kilometers
Mathematics
1 answer:
laila [671]3 years ago
7 0
For the 3 days he ran a total of :  3 * 900 = 2700 meters.

1000 meters = 1 kilometers

2700 meters = 2700 / 1000 = 2.7 kilometers.

Between last week and this week, Bill ran a total of 6 kilometers.

How far he ran this week = 6 - 2.7 = 3.3 kilometers.

Option C.
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we will solve with math
xy=16
x+y=-12
minus  x both sides
y=-12-x
sub for y in other equation
x(-12-x)=16
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add 12x+x^2 both sides
0=x^2+12x+16
use quadratic formula
if you have
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0=x^2+12x+16
a=1
b=12
c=16

x=\frac{-12+/- \sqrt{12^{2}-4(1)(16) }}{2(1)}
x=\frac{-12+/- \sqrt{144-64 }}{2}
x=\frac{-12+/- \sqrt{80}}{2}
x=\frac{-12+/- 4\sqrt{5}}{2}
x=\frac{-6+/- 2\sqrt{5}
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aprox
x=-1.52786 or -10.4721

those are the numbers

the numbes are -1.52786 or -10.4721

6 0
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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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