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stiv31 [10]
3 years ago
15

Please solve and explain steps for this problem.

Mathematics
1 answer:
Helen [10]3 years ago
7 0
This means Square root (^1/2). this is kind of hard to read. anyways. 32^(1/2) separates into 4^(1/2) and 8^(1/2), which further separates into 4^(1/2) and 2^(1/2), root 4 becomes 2, their are two root 4's, so you get 2 x 2, and you are left with 2^(1/2) now why go to all this trouble. because now you can multiply the 4 you created (2x2) times, the 7... giving you 28*2^(1/2) now subtract it from the the other one with root 2. -5*2^(1/2), giving you 23*2^(1/2)-...idk what that last bit is. if its a odd number then this is the end of the problem, if you can get it to root 2. then do that and simplify.
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HELP PLEASEE!!!!
ss7ja [257]

Answer:

See below ~

Step-by-step explanation:

\textsf {Each of the steps has been reasoned below :}

\implies \textsf {3x - 2 = 4 (Given)}

\implies \textsf {3x = 6 (Addition Property of Equality)}

\implies \textsf {x  = 2 (Division Property of Equality)}

\textsf {In the second step, the property has been applied}\\\textsf {by adding 2 to each side of the equation.}

\textsf {In the third step, the property has been applied by dividing 3 on each side.}

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salantis [7]

Answer:

D is your answer.

Step-by-step explanation:

if you do 2 numbers to the right you get 3 and now the half would go in between 3 which would make your answer 3 and one half

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What number do we divide by -9 to get 8?
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Answer:

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Answer:

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Step-by-step explanation:

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3 years ago
An article presents a study of the failure pressures of roof panels. A sample of 15 panels constructed with 8-inch nail spacing
wariber [46]

Answer:

There is sufficient evidence to conclude that six inches spacing has a higher mean failure pressure than 8 inches

Reject H_0\ at\ 5% level of significance

Step-by-step explanation:

From the question we are told that:

Sample size 1 n_1=15

Spacing 1 s_1=8

Mean 1 \=x_1=8.48

Standard deviation 1 \sigma_1=0.96 kPa

Sample size 2 n_2=16

Spacing 2 s_2=6

Mean 1 \=x_1=9.93

Standard deviation 1\sigma_1=1.02 kPa

Generally the hypothesis is mathematically given as

Null H_0:\mu_1-\mu_2

Alternative H_a:\mu_1\mu_2

Generally the equation for pooled estimate is mathematically given by

  S=\sqrt{\frac{(n_1-1)\sigma_1^2+(n_2-1)\sigma_2^2}{n_1+n_2-2} }

Therefore

  S=\sqrt{\frac{(15-1)0.96^2+(16-1)1.02^2}{15+15-2} }

 S=0.9905

Generally the equation for test statistics is mathematically given by

 t=\frac{\=x_1+\=x_2}{S\sqrt{\frac{1}{n _1}+\frac{1}{n_2}}}

 t=\frac{\=8.48-9.93}{0.9905\sqrt{\frac{1}{15}+\frac{1}{15}}}

 t=-4.00091

Therefore From table

 P value=P(t_{15+15-2}=4.00091)

 P value=0.00041918

 P

Therefore

There is sufficient evidence to conclude that six inches spacing has a higher mean failure pressure than 8 inches

Reject H_0\ at\ 5% level of significance

3 0
3 years ago
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