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Vitek1552 [10]
3 years ago
6

Hello I can only pick one!! how do I do this!

Mathematics
2 answers:
liubo4ka [24]3 years ago
3 0

Answer:

well the answer should be -1.8

but I'm guessing A

ra1l [238]3 years ago
3 0

Answer:

-\frac{9}{10} or -0.9 or C

Step-by-step explanation:

\frac{2}{4}\div\frac{-5}{9} = ?

\frac{2}{4} = 0.5

\frac{-5}{9} = -0.555555555556

0.5\div-0.555555555556 = -0.899999999999 = -0.9

So, the answer is C.

This is because A is \frac{-9}{10} instead of -\frac{9}{10}.

<em>Hope this helps! <3</em>

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Answer:

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An elevator descends 500 feet in 20 seconds.How would you express the change in the elevators height per second
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Read 2 more answers
Janell has a 10 inch by 12 inch photograph. She wants to scan the photograph
Dmitry_Shevchenko [17]

<u>Complete Question:</u>

Janeel has a 10 inch by 12 inch photograph. She wants to scan the photograph, then reduce the results by the same amount in each dimension to post on her Web site. Janeel wants the area of the image to be one eight of the original photograph. Write an equation to represent the area of the reduced image. Find the dimensions of the reduced image.

<u>Correct Answer:</u>

A) (10-x)(12-x)=15

B) Dimensions are : Length = 10-x = 3 inch , Breadth = 12-x = 5 inch

<u>Step-by-step explanation:</u>

a. Write an equation to represent the area of the reduced image.

Let the reduced dimensions is by x , So the new dimensions are

length=10-x\\breadth=12-x

According to question , Area of new image is :

⇒ Area = \frac{1}{8}Length(breadth)

⇒ Area = \frac{1}{8}(10)(12)

⇒ Area = 15

So the equation will be :

⇒ (10-x)(12-x)=15

b. Find the dimensions of the reduced image

Let's solve :  (10-x)(12-x)=15

⇒ 120-10x-12x+x^2=15

⇒ 120-22x+x^2=15

⇒ x^2-22x+105=0

By Quadratic formula :

⇒ x = \frac{-b \pm \sqrt{b^2-4ac} }{2a}

⇒ x = \frac{22 \pm8 }{2}

⇒ x = \frac{22 +8 }{2} , x = \frac{22 -8 }{2}

⇒ x = 15 , x =7

x = 15 is rejected ! as 15 > 10 ! Side can't be negative

⇒ x =7

Therefore, Dimensions are : Length = 10-x = 3 inch , Breadth = 12-x = 5 inch

7 0
3 years ago
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