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Anastaziya [24]
3 years ago
8

Use properties of equality to solve the equation for w. You must show your work. 2(w+3) = −2(w−21)

Mathematics
2 answers:
Hunter-Best [27]3 years ago
8 0

Answer:

Today: Friday, 06 November 2020

Hour: 19.17 WIB (Indonesia)

<u>_______________________________</u>

2 (w + 3) = -2(w - 21)

2w + 6 = -2w + 42

2w + 2w = -6 + 42

4w = 36

w = 9

natta225 [31]3 years ago
3 0

Answer:

9

Step-by-step explanation:

2w+6=-2w+42

4w+6=42

4w=36

w=9

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use the intermediate value theorem to determine whether the following equation has a solution or not x^3-3x-1
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Answer:

Yes, this equation has a solution. According to Intermediate Value Theorem at least one solution for [0,2]

Step-by-step explanation:

Hi there!

1) Remember a definition.

Intermediate Value Theorem:

If f is continuous on a given closed interval [a,b], and f(a)≠f(b) and f(a)<k<f(b) then there has to be at least one number 'c' between 'a' and 'b', such that f(c)=k

----

(Check the first graph as an example)

2) The Intermediate Value Theorem can be applied to determine whether there is a solution on a given interval.

Let's choose the interval [0,2]

f(x)=x^{3}-3x-1\\f(0)=(0)^{3}-3(0)-1\\f(0)=-1\\f(0)

Proceed to the other point: 2

f(x)=x^{3}-3x-1\\f(2)=(2)^{3}-3(2)-1\\f(2)=1\\f(2)>0\\

3) Check the 2nd Graph for a the Visual answer, of it.  And the 3rd graph for all solutions of this equation.

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3 years ago
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Step-by-step explanation:

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