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2 years ago

Add the integers. 1. -2 +(-5) 2. -2 +(-2) 3. -13 +9

Mathematics

1 answer:

Maru [420]2 years ago

7 0

-7 because when it’s +(-) it’s always the same as the outside sign
-4 same thing explained above
-4

hope this helps

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Do this for me pls its mdths

Vadim26 [7]

Answer:

A = -1

B = -3

C = -7

Step-by-step explanation:

See attached image.

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2 years ago

Help please answer questions below

djverab [1.8K]

3/8 is0.375 so it would stay as 2 and 5/6 is 0.8333 so it rounds up to 9
So now do 2 times 9 = 18

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3 years ago

Jamal will cut a piece of wood that is 3 1/2 feet long into 1/4 foot sections. How many sections will result? plz help

Ray Of Light [21]

Answer:

Hi there the answer is 10

The 2 whole feet are 8 1/4’s and the 1/2 of a foot can get cut twice into 1/4’s.

Step-by-step explanation:

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2 years ago

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The specification for the pull strength of a wire that connects an integrated circuit to its frame is 10 g or more. In a sample

Wittaler [7]

Answer:

The 95% confidence interval for the difference is (-0.1888, 0.0202).

Step-by-step explanation:

Difference between proportions:

The distribution of the difference between two proportions has mean of the difference between these proportions and standard deviation is the square root of the sum of the variances. So

In a sample of 86 units made with gold wire, 68 met the specification

This means that:

$pX = \frac{68}{86} = 0.7907$

$sX = \sqrt{\frac{0.7907*0.2093}{86}} = 0.0439$

In a sample of 120 units made with aluminum wire, 105 met the specification.

This means that:

$pY = \frac{105}{120} = 0.875$

$sY = \sqrt{\frac{0.875*0.125}{120}} = 0.0302$

Difference:

$p = pX - pY = 0.7907 - 0.875 = -0.0843$

$s = \sqrt{sX^2 + sY^2} = \sqrt{0.0439^2+0.0302^2} = 0.0533$

Confidence interval:

$p \pm zs$

In which z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ , with $\alpha$ being 1 subtracted by the confidence level.

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

Lower bound of the interval:

$p - zs = -0.0843 - 1.96*0.0533 = -0.1888$

Upper bound of the interval:

$p + zs = -0.0843 + 1.96*0.0533 = 0.0202$

The 95% confidence interval for the difference is (-0.1888, 0.0202).

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3 years ago

Glenn can make 12 flyers in 42 minutes. How long will it take him to make 50 flyers?

Zanzabum

Answer:

175 Minutes or 2.9 Hours

Step-by-step explanation:

42 / 12 = 3.5

50 x 3.5 = 175

3 0

3 years ago

Read 2 more answers