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natita [175]
3 years ago
7

If -4 * -4 = 16, but -4^2 = -16, how is that possible?

Mathematics
2 answers:
Morgarella [4.7K]3 years ago
7 0

Answer:

This is not possible

Step-by-step explanation:

The only way you get this is if you plug it into the calculator without placing parenthesis around -4

For example:

-4^2 = -16 while (-4)^2= 16

When doing math it is common knowledge that when two negative numbers are multiplied together the negative sign will cancel out and turn into a positive product.

----

Also -4*-4 is the same as -4^2 just written differently

Tcecarenko [31]3 years ago
6 0

Answer:

determine if true .  and this is false

Step-by-step explanation:

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seropon [69]

Answer:

a = \frac{b^2-d}{4c}

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Step-by-step explanation:

Order of Operations: BPEMDAS

<u>Question 1</u>

Step 1: Write out discriminant

d = b² - 4ac

Step 2: Subtract b² on both sides

d - b² = -4ac

Step 3: Divide both sides by -1

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Step 4: Divide both sides by 4c

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<u>Question 2</u>

Step 1: Write out equation

2/3(x - 18y) = 6y

Step 2: Distribute parenthesis

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Step 3: Isolate <em>x </em>by adding 12y on both sides

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Step 4: Divide both sides by 2/3

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7 0
3 years ago
The function C(x) = 29x + 54.5 represents the cost (in dollars) of cable for x months, including $54.50 installation fee. How ma
Ratling [72]

Hey there!!

Given equation :

... c(x) = 29x + 54.5

<em>In this equation $54.50 is installation fee and this would remain as a constant. ( This value wouldn't change ). </em>

<em>'x' is represented as the number of months. </em>

The total cost or c(x) is given as $344.50

Getting this into equations :

... 344.50 = 29x + 54.5

Subtracting 54.5 on both sides :

... 29x = 290

Dividing by 29 on both sides :

... x = 10

<u><em>Hence, the number of months is 10. </em></u>

Hope my answer helps!!

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3 years ago
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Answer:

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Answer:

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Step-by-step explanation:

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