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3 years ago

11 feet 8 inches plus 2 feet 9 inches. This confuses me.

Mathematics

2 answers:

babymother [125]3 years ago

6 0

The answer wold be 13ft and 17inch

Artemon [7]3 years ago

6 0

So their is 12 inches in 1 foot which you should know. If you do the simple part first, which is to add 11 feet plus 2 feet then you get 13 feet. You then add 8 inches and 9 inches which is 17 inches but that's over 12 so you subtract 12 from 17 and you are left with 5 but that subtracted 12 gets added to the 13 feet by adding 1 single foot. The final answer should be 14 feet 5 inches.

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Find 5/6(−4 x 2/7). Write your answer in simplest form.

shtirl [24]

-0.96
If you look up that exact equation on google you get -0.952380952 and you just round it to get -0.96

4 0

3 years ago

Read 2 more answers

If a 12 sided regular polygon rotates about its center at which angle of rotation will the image of the polygon coinside with th

Amanda [17]

Answer: 30 degrees

This is the minimum amount of rotation.

Why this value? Well because 360/12 = 30

Consider a triangle with 3 sides. Specifically I mean an equilateral triangle. We can rotate it 120 degrees to have it line up with itself. Now notice that 360/3 = 120.

For a square, we can rotate it 90 degrees and we can say 360/4 = 90

So the general rule is that the minimum angle of rotation is 360/n, where n is the number of sides. This rule only works for regular polygons. Regular polygons have the same side length and the same angle measure (the side and angle measure won't necessarily be equal).

So going back to this 12 sided dodecagon, we have n = 12 and 360/n = 360/12 = 30 as the minimum angle of rotation. Each 30 degree rotation will have the polygon match up perfectly with its old image. The preimage and image will be identical.

6 0

3 years ago

5h+-6h=20 solve h help me please

Vikki [24]

5h-6h=20
-h=20
h=-20

5(-20)-6(-20)=20
-100+120=20
20=20

The answer to solve h would be -20! :)

6 0

3 years ago

Read 2 more answers

A bank is investigating ways to entice customers to charge more on their credit cards. (Banks earn a fee from the merchant on ea

MAVERICK [17]

Answer:

$CI = (\bar{x_{1} } - \bar{x_{2}} ) \pm MoE\\\\$

$CI = (527 - 439) \pm 25.75\\\\CI = 88 \pm 25.75\\\\CI = 88 - 25.75 \:\: and \:\: 88 + 25.75\\\\CI = (62.2 \: ,\: 113.8 )$

The correct answer choice is a. (62.2, 113.8)

Step-by-step explanation:

Of the 500 customers who were told the increase applied to charges above $1000 each month, the average increase in spending was $527 with a standard deviation of $225.

Sample size = n₁ = 500

Sample mean = x₁ = $527

Standard deviation = s₁ = $225

Of the 500 customers who were told the increase applied to charges above $2000 each month, the average increase in spending was $439 with a standard deviation of $189

Sample size = n₂ = 500

Sample mean = x₂ = $439

Standard deviation = s₂ = $189

We are asked to find the 95% confidence interval for the difference between two means.

The given group of answer choices are

a. (62.2, 113.8)

b. (86.2, 120.5)

c. (10.3, 23.8)

d. (55.6, 67.8)

The confidence interval for the difference between two means is given by

$CI = (\bar{x_{1} } - \bar{x_{2}} ) \pm MoE\\\\$

Where $\bar{x_{1} }$ and $\bar{x_{2} }$ are the given sample means and margin of error is given by