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4 years ago

Simplify |3-8|-(12.3+1)

Mathematics

2 answers:

kipiarov [429]4 years ago

4 0

$| - 5| - 13.3 \\ 5 - 13.3 \\ - 8.3$
the answer is -8.3

True [87]4 years ago

3 0

Answer:

-8.3

Step-by-step explanation:

First we do 3-8=-5. Since this is absolute value, the number becomes 5.

then, we have 13.3 for the other one . Then, 5 -13.3 is -8.3

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4 years ago

Evaluate functions х h(x) = 17+ 6 h(-18) =

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Answer:-1.277778 i think

Step-by-step explanation:

i think this means h(x) = (17+6)÷x

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would help if you put the question in standard format

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3 years ago

Each number in the following sequence has the same relationship to the number immediately before it. How can you find the next n

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3 years ago

Read 2 more answers

Simplify: -(7x-9) PLEASE HELP ASAP

kogti [31]

Answer:

-7x+9

Step-by-step explanation:

All you are doing is distributing the negative

The equation should now be -7x+9 ( a negative times a negative is always positive)

7 0

3 years ago

The data below gives the mean price (in cents) of a liter of regular gasoline at self-service filling stations at a sample of si

bogdanovich [222]

Answer:

135.05 ; 2.762 ; (133.201, 136.899) ; (132.840, 137.260)

Step-by-step explanation:

Given the data:

Urban area Price/liter

St. John, NL 137.1

Halifax 133.6

Montreal 136.2

Regina 132.3

Saskatoon 132.2

Yellowknife 138.9

Mean = (137.1 + 133.6 + 136.2 + 132.3 + 132.2 + 138.9) / 6

= 810.3 / 6

= 135.05

Standard deviation (σ) : √Σ(X - mean)²/n-1

(137.1 - 135.05)^2 + (133.6 - 135.05)^2 + (136.2 - 135.05)^2 + (132.3 - 135.05)^2 + (132.2 - 135.05)^2+ (138.9 - 135.05)^2 = 38.135

√(38.135 / (6 - 1))

= √7.627

= 2.7617023

= 2.762

C.)

90% confidence interval of the mean :

Mean ± Zcrit * σ/√n

Zcrit at 90% = 1.64

135.05 ± 1.64 * (2.762/√6)

135.05 ± 1.64 * 1.1275817

Lower Value = (135.05 - (1.64 * 1.1275817)) = 133.201

Upper Value = (135.05 + (1.64 * 1.1275817))) = 136.899

Confidence interval = (133.201, 136.899)

D.)

95% confidence interval of the mean :

Mean ± Zcrit * σ/√n

Zcrit at 95% = 1.96

135.05 ± 1.96 * (2.762/6)

135.05 ± 1.96 * 1.1275817

Lower Value = (135.05 - (1.96 * 1.1275817)) = 132.840

Upper Value = (135.05 + (1.96 * 1.1275817)) = 137.260

Confidence interval = (132.840, 137.260)

4 0

3 years ago