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neonofarm [45]
3 years ago
6

How do I do proofs? ​

Mathematics
1 answer:
Neko [114]3 years ago
7 0
Is this algebra? What type of Math this
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|x-3|+5 <br> i need to find out the absolute value
Assoli18 [71]
I got 5 I’m not for sure tho
7 0
3 years ago
Read 2 more answers
Solve for w, where w is a real number.
Ber [7]

Answer:

w= 9

Step-by-step explanation:

\sqrt{ - 4w + 61}  = w - 4

Square both sides:

-4w +61= (w -4)²

\boxed{(a - b)^{2}  = a^2 -2ab + b^2 }

Expand:

-4w +61= w² -2(w)(4) +4²

-4w +61= w² -8w +16

Simplify:

w² -8w +16 +4w -61= 0

w² -4w -45= 0

Factorize:

(w -9)(w +5)= 0

w -9= 0 or w +5= 0

w= 9 or w= -5 (reject)

Note:

-5 is rejected since we are only taking the positive value of the square root here. If the negative square root is taken into consideration, then w= -5 would give us -9 on both sides of the equation.

<u>Why </u><u>do </u><u>we </u><u>use </u><u>negative </u><u>square </u><u>root?</u>

When solving an equation such as x²= 4,

we have to consider than squaring any number removes the negative sign i.e., the result of a squared number is always positive.

In the case of x²= 4, x can be 2 or -2. Thus, whenever we introduce a square root, a '±' must be used.

However, back to our question, we did not introduce the square root so we should not consider the negative square root value.

6 0
2 years ago
Read 2 more answers
What are the solutions to the equation?<br><br> 3x^2+6x=45<br><br> Enter your answers in the boxes.
Gnoma [55]

x= 3,-5

hope this helps

5 0
3 years ago
Read 2 more answers
33 pounds of dog food for $45 how much is it per pound
Whitepunk [10]

Answer:

1 pound = .73 dollars rounded.

Step-by-step explanation:

This is like a rate question. Speed is in miles / hour only the units for this question is pound / dollar.

pounds = 33

dollars = 45

1 pound is 33/45

1 pound = 0.73

7 0
1 year ago
What is 2000(2000^2000)?
Harrizon [31]

Answer:

A. 2000²⁰⁰¹

Step-by-step explanation:

2000(2000²⁰⁰⁰) = 2000²⁰⁰⁰+1 = 2000²⁰⁰¹

7 0
2 years ago
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