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2 years ago

Is it true 4 and -4 have a sum of 0

Mathematics

1 answer:

mafiozo [28]2 years ago

3 0

Answer:

Yes, 4 + -4 = 0.

Think of it like a number line: The number four is 4 units to the right of the center which is 0, and the number negative four is 4 units to the left of the center. When you add them together, those distances cancel out, and you just get 0.

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HEY GUYS I NEED THIS ANSWER NOW

Sergio [31]

Let

x-------> the number of fiction books

y-------> the number of nonfiction books.

we know that

$x+y=26$ -----> equation $1$

$x=y+12$

$x-y=12$ -----> equation $2$

Add equation $1$ and equation $2$

$x+y=26\\x-y=12\\ ------\\ 2x=38\\ x=38/2\\x=19\ fiction\ books$

<u>find the value of y</u>

$x+y=26$

$19+y=26$

$y=26-19=7\ nonfiction\ books$

therefore

<u>the answer is</u>

Part a) the number of fiction books is $19\ fiction\ books$

Part b) the number of nonfiction books is $7\ nonfiction\ books$

6 0

2 years ago

Read 2 more answers

Roberto made a 74 on last week's math quiz. This week he made an 85 on

FinnZ [79.3K]

Answer:

His quiz score increased by about 7%.

Step-by-step explanation:

Take the two quiz scores and add them together to get 159.

Take the difference between the two quiz scores to get 11.

Divide the difference by the sum to get 0.0692 or about 7%.

6 0

2 years ago

Solve |2x - 5| = 4. {x | x = 0.5 or x = 4.5} {x | 0.5 < x < 4.5} {x | x = -4.5 or x = 4.5} Solve |2x - 5| = 4.

stiks02 [169]

Answer:

x = 4.5 x = .5

Step-by-step explanation:

|2x - 5| = 4

The absolute value has two solutions one positive and one negative

2x-5 = 4 2x-5 = -4

Add 5 on each side

2x-5+5 = 4+5 2x-5+5 = -4+5

2x = 9 2x =1

Divide by 2

2x/2 =9/2 2x/2 = 1/2

x = 4.5 x = .5

3 0

3 years ago

Solve the Application The television service offers hundreds of channels. Sam had 486 channels and ordered an additional 129. Af

Ratling [72]

Answer:

464

Step-by-step explanation:

Initial number of channels = 486

Additional channels = 129

Number of channels removed = 151

To obtain the number of channels he has now :

We Take the sum of the number of initial and additional channels, then we subtract the number of channels removed :

Number of channels he has now :

486 + 129 - 151 = 464

8 0

2 years ago

Find the length and width of a rectangle that has a perimeter of 100 meters and a maximum area

madreJ [45]

A rectangle with maximum area is always a square

a square has the same length and width.

to find the length of the side of a square with the known area, you would take the square root of the area

so in this case, the side length = square root of 100

square root (100) = 10 ( check: 10 x 10 = 100)

so both the length and the width equal 10 meters

8 0

2 years ago