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3 years ago

Calculando a expressão (-2)² + (+5)², obtemos qual resultado?

Mathematics

2 answers:

Contact [7]3 years ago

7 0

This answer would be D) + 6.

Hope this helps if so please mark me as brainlest thank you !!

Ronch [10]3 years ago

6 0

Answer:

Step-by-step explanation:

(-2)² + (+5)² = (-2)*(-2) + 5 * 5

= 4 + 25

= +29

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What is the mean of this sample, which consists of 10

In-s [12.5K]

Answer:

The mean of the samples is 21

Step-by-step explanation:

Mean is defined as the average sum of numbers i.e total sum of given numbers divided by the total number.

Given the randomly selected numbers as shown;

7, 100, 1, 3, 7, 10, 15, 12, 17, 38

Total sum of numbers = 7+ 100 + 1 + 3 + 7 + 10 + 15 + 12 + 17 + 38

= 210

Total numbers given = 10

Mean = 210/10

Mean = 21

7 0

3 years ago

Is ABC ~ DEF? If so, name which similarity postulate or theorem applies?

Margarita [4]

These triangles are similar because 2 pairs of angles are equal. I'm not very familiar with the acronyms in the list but I guess it must be AA.

3 0

3 years ago

Read 2 more answers

Simplify -5 1/4 - (-7 1/2) please<br> also ignore my tabs pls

Kruka [31]

Answer: 1/8

Step-by-step explanation:

1/2 x 1/4 = 1 x 1/2 x 4

8 0

3 years ago

The value of a rare baseball card A appreciated by 20 percent over a five year period; over the next five years, the value plumm

lbvjy [14]

<h2>Answer:</h2>

<em><u>Percent value of A with respect to Percent value of B is,</u></em>

$30\%$

<h2>Step-by-step explanation:</h2>

In the question,

Let us say the value of the Baseball card A and B initially is = 100x

So, for Baseball card A in first 5 years percent increase = 20%

So,

Value after 5 years = 100x + 20% of 100x = 120x

<u>After 5 more years,</u>

Percent decrease = 50%

So,

<u>Value at the end of 10 years = 120x - 50% of 120x = 60x</u>

Now,

For Baseball card B, Percent increase in 10 years = 100%

So,

<u>Value of card B = 100x + 100% of 100x = 200x</u>

So,

<em><u>Percent value of A with respect to Percent value of B is,</u></em>

$\frac{60x}{200x}\times 100=30\%$

7 0

3 years ago

Rewrite as a positive exponent 5 – 2

Vadim26 [7]

To express
5
−
2
as a positive exponent we will use this rule of exponents:
x
a
=
1
x
−
a
5
−
2
=
1
5
−
−
2
=
1
5
2

5 0

3 years ago