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4 years ago

What is the differnence between (-2)^2 and -2^2 in math

Mathematics

2 answers:

zhuklara [117]4 years ago

8 0

Answer: The one with perinthesis is bigger because you would do the negative first and you would have nothing to take away from

Step-by-step explanation:

wariber [46]4 years ago

4 0

Answer:

(-2)^2 = 4
-2^2 = -4

Step-by-step explanation:

The first is (-2)(-2) = 4.

The second is -(2)(2) = -4.

The order of operations says exponents are evaluated first. An exponent signifies repeated multiplication of the base.

_____

If your calculator is working correctly, it will show you the difference.

Beware spreadsheet programs. They don't always follow the order of operations when evaluating formulas. Parentheses are often required to keep them honest.

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You borrow bookcases to display 943 books. You plan to put 22 books on each shelf. There are 5 shelves. How many bookcases do yo

zaharov [31]

Answer:

9 bookcases.

Step-by-step explanation:

Total number of books = 943

Total number of books placed in one shelf = 22

Total number of shelves in one bookcase = 5

Total number of books displayed in one bookcase = $No.\ of\ shelves\ in\ 1\ bookcase\times\ No.\ of\ books\ in\ each\ shelf$

Total number of books displayed in one bookcase= $5\times 22=110$

Total number of bookcase required = $\frac{total\ no.\ of\ books}{Number\ of\ books\ displayed\ in\ 1\ bookcase}$

Total number of bookcase required = $\frac{943}{110} =8\frac{63}{110}$

So, 880 books can be displayed in 8 bookcases. and for the remaining 63 books we also require one more bookcase. Therefore, the total number of bookcases needed are 9.

5 0

3 years ago

Which pair shows equivalent expressions?

umka21 [38]

Answer:

Don'tknow I am sorry...................... 

5 0

3 years ago

Order from least to greatest -5, -3, -2.6, 3, 0,-15 , sorry for my english

stepan [7]

Answer:

-15, -5, -3, -2.6, 0, 3

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

One number is six more than twice a second number. If their sum is 120, find the smaller number

Vera_Pavlovna [14]

Answer: 38

Step-by-step explanation:

Step 1: use variables to replace the two numbers

the second number = x

six more than twice the second number = 2x + 6

Their sum is 120: 3x + 6 = 120

Step 2: solve the equation

3x = 114

x = 114/3 = 38

Step 3: check your answer (optional)

six more than twice 38 = 82

38 + 82 = 120

hope this helps

8 0

2 years ago

Two times the difference of a number and 8 is equal to 7

maks197457 [2]

2(x-8)=7

Distribute on the left side
2x-16=7

Add 16 to both sides
2x=23

Divide both sides by 2
x=11.5

Final answer: The number is 11.5

5 0

3 years ago