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3 years ago

Help me with this please!!!!!!!!!

Mathematics

2 answers:

IrinaVladis [17]3 years ago

8 0

Answer:

d = 17.58

Step-by-step explanation:

d = √(x2 - x1)^2 + (y2 - y1)^2 + (z2 - z1)^2

P1(0, 0, 0) P2(8, 7, 14)

Substitute the values in the above equation and you will get

d = √(8 - 0)^2 + (7 - 0)^2 + (14 - 0)^2

= √(64 + 49 + 196)

= √309

= 17.58

Anastasy [175]3 years ago

3 0

Answer:

The answer is 17.58

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A rectangular room is 1.5 times as long as it is wide, and its perimeter is 25 meters. Find the dimensions of the room.meters.Th

AlladinOne [14]

Answer:

The length is 7.50metres and the width is 5metres

Explanation:

Given the following

Length = 1.5Width

Perimeter = 25m

Required

Dimension of the room

Perimeter of the rectangular room = 2(L+W)

Since L = 1.5W

P = 2(1.5W+W)

P = 2(2.5W)

P = 5.0W

25 = 5W

W = 25/5

W = 5metres

Since L = 1.5W

L = 1.5*5

L = 7.5meters

The length is 7.50metres and the width is 5metres

3 0

1 year ago

A store holiday sale has an item marked down by $10 with an additional discount of 25% off the

ValentinkaMS [17]

Answer:

C : $58.36

Step-by-step explanation:

Given:

A store holiday sale has an item marked down by $10.

Discount on new price = 25%

Final price was $36.27.

Question asked:

what was the original ?

Solution:

Let original price = $x$

New price = $x - 10$

Original price - marked down amount - discount amount = $36.27

$x - 10 -25\% of(x - 10 ) = 36.27\\$

$x - 10 - \frac{25}{100} (x - 10) = 36.27\\x - 10 - 0.25(x - 10) = 36.27\\x - 10 -0.25x +2.5 = 36.27\\0.75x - 7.5 = 36.27\\$

Adding both side by 7.5

$0.75x = 43.77\\$

Dividing both side by 0.75

$x = 58.36$

Therefore, the original price was $58.36

5 0

3 years ago

An appliance manufacturer stockpiles washers and dryers in a large warehouse for shipment to retail stores. Sometimes in handlin

Over [174]

Answer:

This is strong evidence that more than 2% get damaged

Step-by-step explanation:

The company goal is to keep the proportion of damaged machines below 2%

$H_o: p = 0.02$

$H_a: p > 0.02$

One day an inspector randomly checks 66 washers and finds that 6 of them have scratches or dents

So, x = 6

n = 66

$\widehat{p}=\frac{x}{n}$

$\widehat{p}=\frac{6}{66}$

Formula : $z=\frac{\widehat{p}-p}{\sqrt{\frac{p(1-p)}{n}}}$

$z=\frac{\widehat{p}-p}{\sqrt{\frac{p(1-p)}{n}}}$

$z=\frac{\frac{6}{66}-0.02}{\sqrt{\frac{0.02(1-0.02)}{66}}}$

$z=4.114$

So, the value of test statistic is 4.114

2) What is the P-value of the test statistic?

So, p value using calculator = .00002

p value < α

So, we accept the alternate hypothesis

So, This is strong evidence that more than 2% get damaged

8 0

3 years ago

Factor 9b^2 - 4.<br><br> (3b + 1)(3b - 4)<br> (3b + 2)(3b - 2)<br> (3b - 2)(3b - 2)

maria [59]

The answer should be (3b + 2)(3b - 2) since if you multiply those two, you will get back to original equation.

Hope this helps!

5 0

3 years ago

Read 2 more answers

if the length of the longest side of the rectangle is 20cm find the shaded area to the nearest hundredth PLEASE HELPP !

djverab [1.8K]

Answer:

150pi

Step-by-step explanation:

lets just say the two circles are 10 and 10 in diameter. so, one square is 5 radius. The square is 25pi area. so two are 50pi area. the area of the rectangle is 200, so 150pi

Please tell me if I'm wrong D:

3 0

3 years ago