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neonofarm [45]
3 years ago
6

The number of streetlights in a town is growing linearly. Four months ago (n = 0) there were 130 lights. Now (n = 4) there are 1

46 lights. If this trend continues, a. Find an explicit formula for the number of lights in month n b. How many months will it take to reach 200 lights?
Mathematics
2 answers:
beks73 [17]3 years ago
6 0
Easy
find equation
y=mn+b
for n=0, y=130
130=m0+b
130=b

y=mn+130
also
n=4 for 146
146=4m+130
minus 130 both sides
16=4m
divide by 4 both sides
4=m


y=4n+130

find n for y=200

200=4n+130
minus 130 both sides
70=4n
divide both sides by 4
17.5=n

answer is 17.5 months
stich3 [128]3 years ago
4 0

13.5 months

146-130=16

16/4=4

200-146=54

54/4=13.5

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Option A.

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Case III: 6x+18>2x+4

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4x>-14

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x>-\dfrac{7}{2}     ...(3)

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\dfrac{7}{4}

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Andrei [34K]

Answer:

A) ERROR

B) ∠C = 26°

Step-by-step explanation:

Houston, We have a problem!!! too much information

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  28.395 = 23.390

as this is NOT an equality, the triangle does not exist as described.

IF it did, we'd get different results depending on which set we used

∠F = 180 - 138 - 20 = 22°

Law of sines

19/sin138 = DE/sin22 ⇒ DE = 19sin22/sin138 = <u>10.63697...</u>

or

8/sin20 =  DE/sin22 ⇒ DE = 8sin22/sin20 = <u>8.762211...</u>

If we attempt to use Law of cosines

DE² = 19² + 8² - 2(19)(8)cos22 = <u>11.9639...</u>

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29.51270 / sin120 = 15/sinC

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6 0
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Gre4nikov [31]

*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆

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I hope this helped!

<!> Brainliest is appreciated! <!>

- Zack Slocum

*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆

3 0
2 years ago
Read 2 more answers
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