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Nina [5.8K]
3 years ago
11

4 (5х + 3) - 9x = 11х +. A. 12 B- -12 C- -3

Mathematics
1 answer:
andrey2020 [161]3 years ago
7 0

Answer:

no solution

Step-by-step explanation:

What you do is get x by itself.

4 (5х + 3) - 9x = 11х

20x + 12 - 9x = 11x

11x + 12 = 11x

-11x +11x = 0 which means

no solution

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3x = 27
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Answer:

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Step-by-step explanation:

Since you are trying to make x on its own, you are trying to get rid of the co-efficient. The co-efficient is three, so you divide 3 by 3, which would equal one, leaving x on its own. Whatever you do to one side you do to the other, so you would divide 27 by 3 as well.

x = 9

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Write an equation that shows the relationship 40% of 140 is x
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Answer:

x=140times0.4

Step-by-step explanation:

then subtract your anser from 140

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Evaluate 1.1.075 + 21.67 <br> 3.15<br> ​
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Answer:

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Karin has 461 songs downloaded joe has 123 more songs downloaded than Karin let s=the number of songs joe downloaded
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Answer:

s=461+123

Step-by-step explanation:

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3 years ago
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
2 years ago
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