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3 years ago

Is the equation a true statement when x -3 is -3 a solution to the equation 6x + 5=5x + 8 +2x

Mathematics

2 answers:

Degger [83]3 years ago

7 0

Answer:

go to the link

Step-by-step explanation:

https://answers.yahoo.com/question/index?qid=20070620063730AAaJuXa

These questions are SOOO easy, but I just don't have a clue. (don't even know if they technically are algebra they are that easy).

x² - 8x - 20 =

(x+10) (x-2)

Thats what I got for that answer (lucky guess) but how do you know which side each sign goes on.. ie (x+10)(x-2) or (x+2) (x-10)??

Same problem with this question...

(x-6) (x-5) =

x² - 11x + 30

ch4aika [34]3 years ago

7 0

Answer:

Yes, a solution

Step-by-step explanation:

Plug -3 in for all the x's to see if it is a solution

6x + 5=5x + 8 +2x

6(-3)+5=5(-3)+8+2(-3)

Multiply on the left

-18+5=5(-3)+8+2(-3)

Add on the left

-13=5(-3)+8+2(-3)

Multiply on the right

-13= -15+8-6

Add on the right

-13=-7-6

-13=-13

Because they are equal, -3 is a solution

Hope this helps! :)

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mariarad [96]

Answer: 58.11 cm³

Step-by-step explanation:

1. The volume can be calculated with the following formula:

$V=h*w*d$

Where l is the lenght, w is the width and h is the heigth of the smartphone.

2. You know that the dimensions are:

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3. Convert the height and the width from inches to centimeters, as following:

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