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madam [21]
3 years ago
11

Can someone please help???

Mathematics
2 answers:
Yanka [14]3 years ago
5 0

Answer:

[tex]x {y}^{3} \sqrt{25 {x}^{7} {y}^{4} } \\ \\ = {xy}^{3} \sqrt{ {5}^{2} {x}^{7} {y}^{4} } \\ \\ = {xy}^{3} \times \{ ({5}^{2} ) {}^{ \frac{1}{2} } ( {x}^{7} ) {}^{ \frac{1}{2} } ( {y}^{4} ) {}^{ \frac{1}{2} } \} \\ \\

emmasim [6.3K]3 years ago
4 0

Answer:

x {y}^{3}  \sqrt{25 {x}^{7} {y}^{4}  }  \\  \\  =  {xy}^{3}   \sqrt{ {5}^{2} {x}^{7}   {y}^{4} }  \\  \\  =  {xy}^{3}  \times  \{ ({5}^{2} ) {}^{ \frac{1}{2} } ( {x}^{7} ) {}^{ \frac{1}{2} } ( {y}^{4} ) {}^{ \frac{1}{2} }  \} \\  \\  =  {xy}^{3}  \times (5 \times  {x}^{ \frac{7}{2} }  \times  {y}^{2} ) \\  \\  = 5 \times  {x}^{(1 +  \frac{7}{2}) }  \times  {y}^{(3 + 2)}  \\  \\  = { \boxed{ \boxed{5   {y}^{5} \sqrt{ {x}^{9} }  }}}

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liubo4ka [24]

Complete Question

Which of the following statements are true and which are false? Give reasons for your answers.

(i) Only one line can pass through a single point.

(ii) There are an infinite number of lines which pass through two distinct points.

(iii) A line can be produced indefinitely on both sides.

(iv) If two circles are equal, then their radii are equal.

(v) if AB=PQ and PQ=XY, then AB=XY.

A (i),(ii) - True

  (iii),(iv),(v)-False

B(i),(ii),(iii) -True

  (iv),(v)-False

C   (i),(ii) -False

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D  (i),(ii),(iii) -False

    (iv),(v)-True

Answer:

The  correct option is  C

Step-by-step explanation:

    i is false because several lines can pass through a single point

    ii is false because only one line can pass through two distinct points

    iii is true because you can extend a line from both points (start and  end points )

      iv is true because when two equal circle are placed together and radius is trace we will discover that they are equal

       v is true because from Euclid's First Axiom , if a=  c and c =  d  the  a =  d

     

     

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Answer:

a. (29526.192 , 32155.808)

b. (29673.9301 , 32008.0699)

Step-by-step explanation:

on calculation, we find that sample mean = 30843 and sample standard deviation = 3018.504, and n=20

1)

Sample Mean = 30841

SD = 3000

Sample Size (n) = 20

Standard Error (SE) = SD/root(n) = 670.8204

alpha (a) = 1 - 0.95 = 0.05

z critical value for 95% confidence interval:

z(a/2) = z(0.025) = 1.96

Margin of Error (ME) = z(a/2) x SE = 1314.808

95% confidence interval is given by:

Sample Mean +/- (Margin of Error) = 30841 +/- 1314.808

= (29526.192 , 32155.808)

2)when std dev of population is not known, we use sample's, but we have to use t instead of z

Sample Mean = 30841

SD = 3018.504

Sample Size (n) = 20

Standard Error (SE) = SD/root(n) = 674.958

alpha (a) = 1-0.9 = 0.1

we use t-distribution as population standard deviation is unknown

t(a/2, n-1 ) = 1.7291

Margin of Error (ME) = t(a/2,n-1)x SE = 1167.0699

90% confidence interval is given by:

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