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FinnZ [79.3K]
3 years ago
15

Why is it important to describe the variable in an expression?

Mathematics
2 answers:
Korvikt [17]3 years ago
5 0

Answer: They show numerical value. You have to make them clear.

Step-by-step explanation:

Snowcat [4.5K]3 years ago
5 0

Answer:

you define it, and it lets you know how to properly write the equation. ... If you want to solve for the unknowns using mathematical equations it is necessary to define the unknown variables i.e. what they represent in the real world so that the known relationships can be expressed in equation form

Step-by-step explanation:

its basically a value that can hold and amount depending on the value you give it

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Help please!! FACTOR IT
Alexeev081 [22]

Answer:

1. Subtract 18 from both sides to get the equation set to 0:

x2 + 7x - 18 = 0

Now factor. Given the negative sign in front of the 18, you will have (x + ) (x - ) as your factors, with the larger one being positive. Now, which factors of 18 can be combined to get a result of 7? I'll leave that for you.

2- 2.3 Solve : p-7 = 0

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p = 7

3-Final result :

(m - 1) • (m - 8)

4-Step by step solution :

STEP

1

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Trying to factor by splitting the middle term

1.1 Factoring x2-16x+63

The first term is, x2 its coefficient is 1 .

The middle term is, -16x its coefficient is -16 .

The last term, "the constant", is +63

Step-1 : Multiply the coefficient of the first term by the constant 1 • 63 = 63

Step-2 : Find two factors of 63 whose sum equals the coefficient of the middle term, which is -16 .

-63 + -1 = -64

-21 + -3 = -24

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Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above, -9 and -7

x2 - 9x - 7x - 63

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