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STatiana [176]
3 years ago
11

Simplify 5 (2 squared) -1^2

Mathematics
2 answers:
Serggg [28]3 years ago
8 0
19 is the answer since 2 to the 2nd power is 4 5×4=20 -1 to the 2nd power is -1
20-1=19
koban [17]3 years ago
3 0
The answer is 19 since 5x4=20 and 20-1=19
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Here are two sets of numbers, a and b. Set a :200,104,100,160. Set b: 270,400,483,300, x. Mean of set a: mean of set b= 3:8. Wor
LenKa [72]

Given:

The given sets are:

Set a : 200, 104, 100, 160.

Set b: 270, 400, 483, 300, x.

Mean of set a: mean of set b= 3:8

To find:

The value of x.

Solution:

Formula for mean:

Mean=\dfrac{\text{Sum of observations}}{\text{Number of observation}}

The mean of set of a is:

Mean=\dfrac{200+104+100+160}{4}

Mean=\dfrac{564}{4}

Mean=141

The mean of set of b is:

Mean=\dfrac{270+400+483+300+x}{5}

Mean=\dfrac{1453+x}{5}

Mean=\dfrac{1453+x}{5}

It is given that,

Mean of set a: mean of set b= 3:8

\dfrac{141}{\dfrac{1453+x}{5}}=\dfrac{3}{8}

\dfrac{705}{1453+x}=\dfrac{3}{8}

8\times 705=3\times (1453+x)

5640=4359
+3x

Isolate the variable x.

5640-4359
=3x

1281
=3x

Divide both sides by 3.

\dfrac{1281}{3}
=x

427
=x

Therefore, the value of x is 427.

3 0
2 years ago
Angles that are congruent and supplementary must be
Lilit [14]
I think straight angles ?
8 0
3 years ago
Read 2 more answers
P, Q, and R are three different points. PQ = 3x + 2, QR = x, RP = x + 2, and . List the angles of PQR in order from largest to
horsena [70]
<span>PQR is a triangle
QR = x  </span>⇒ x>0
If x>0 then:
QR is the smallest side
PQ is the largest side

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</span>The angles of Δ<span>PQR in order from largest to smallest:
</span>∠R is largest    [opposite to PQ]
∠Q is middle    [opposite to RP]
∠P is smallest   [opposite to QR] 
4 0
3 years ago
Robin and evelyn are playing a target game. the object of the game is to get an object as close to the center as possible. each
svetlana [45]
Here's some of the info

~<span>Evelyn has the greater mean.

~</span>Evelyn’s objects generally landed farther away from the center than Robin’s.<span>
~</span>The object is to get the objects close to the center, so Robin is winning.<span>
</span>
5 0
3 years ago
Read 2 more answers
Please help asap!!
masya89 [10]
If I were solving this equation, I would put x^2-20x+(100)=(10). Since this is in standard form, you could change this into vertex form by making the equation      y=(x-10)^2 -10.
5 0
3 years ago
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