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nexus9112 [7]
3 years ago
12

1. A line passes through (9, -9) and (10,-5).

Mathematics
1 answer:
jenyasd209 [6]3 years ago
5 0

Answer:

1. y+5=4x-40

2.y=4x-45

Step-by-step explanation:

To get the slope of a line you do y₂-y₁/x₂-x₁ so we plug in the values -9+5/9-10 and we get -4

Point-slope form states y-y₁=m(x-x₁) where m is the slope so plug in the values we get y+5=4(x-10) and you get y+5=4x-40 then turn this equation into y=mx+b and get y= 4x-45

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Vlad1618 [11]

Answer:

70 + 4D

Step-by-step explanation:

- (2 x 100) + (7 x 10) + (4 x D) + (2 x 100)

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       -200 + 70 +4D + 200

             -130 + 4D + 200

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5 0
3 years ago
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Answer:

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Step-by-step explanation:

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3 0
3 years ago
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saw5 [17]

Answer:

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Step-by-step explanation:

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3 0
2 years ago
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Troyanec [42]

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Step-by-step explanation:

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4 0
3 years ago
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A survey of several 8 to 9 year olds recorded the following amounts spent on a trip to the mall: $31.11,$25.01,$18.53,$14.37,$24
Alex17521 [72]

Solution :

Amounts spent on a trip : $31.11, $25.01, $18.53, $14.37, $24.16, $21.91

Confidence interval = 80%

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One sample T confidence interval

μ : Mean of variance

80% of confidence interval results :

Using statistical software,

Variable : data

Sample mean : 22.515

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U. Limit : 25.980368

SD = 5.75

Critical value = 1.476

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