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CaHeK987 [17]
2 years ago
9

Need help on these problems plz its for a grade

Mathematics
2 answers:
Ronch [10]2 years ago
6 0

C: 390 because 5 times 6 is 30 and 30 times 13 is 390

irina [24]2 years ago
4 0

Answer:

C. 390 Cubic units

5 * 6 * 13 = 390 cubic units

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In 2000, there were an estimated 5.28 million digital cable subscribers in the United States. The expected increase is 2.61 mill
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Answer:

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Step-by-step explanation:

I am taking the practice.

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Janeel has a 10-inch by 12-inch photograph. She wants to scan the photograph, then reduce the result
Vaselesa [24]

<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

5 0
3 years ago
How to change 3/4 to twelfths
ruslelena [56]
<span>Multiply both sides of the fraction by 3.

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Answer:g(−219.6g+45.6)

Step-by-step explanation:

−6g+9g(0.6)(g+9)−g(6−9)−g(6+9)g(6+9)

−219.6g2+45.6g

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