Geometric mean of 1.5 and 84

Answers

Answer 1

Answer: 2 numbes
add them
1.5+84=85.5
2 numbers so divide that by 2
85.5/2=42.75

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Factor completely x3 + 2x2 – 15x

Answers

$x^3 + 2x^2 - 15x$

first we can factor out an x
$x(x^2 + 2x - 15)$

then we find a pair of numbers that multiply to -15 and add up to 2

this would be 5 and -3
because 5 times -3 = -15
and -3 + 5 = 2

we would then get
$x(x-3)(x+5)$

this would be you answer :)

Hi Lisa

x³ + 2x² - 15x

= x( x-3)(x+5)

I hope that's help:)

Have a great summer :)

8|x-6|-9=4

solve for x

Answers

$8|x-6|-9=4 \n \n 8|x - 6| = 4 + 9 \n \n 8|x - 6| = 13 \n \n |x - 6| = (13)/(8) \n \n ----- \n \n x - 6 = (13)/(8) \n \n x = (13)/(8) + 6 \n \n x = (61)/(8) \n \n ----- \n \n -x + 6 = (13)/(6) \n \n 6 - x = (13)/(8) \n \n -x = (13)/(8) - 6 \n \n -x = - (35)/(8) \n \n x = (35)/(8) \n \n ----- \n \n x = (35)/(8) , (61)/(8) \n \n$

The answer is: x = 35/8 and x = 61/8.

Which are sums of perfect cubes? Check all that apply.A=8x6 + 27
B=x9 + 1
C=81x3 + 16x6
D=x6 + x3
E=27x9 + x12
F=9x3 + 27x9

Answers

I think these are the sums of perfect cubes.

A = (2x²)³ + (3)³
B = (x³)³ + (1)³
D = (x²)³ + (x)³
E = (3x³)³ + (x^4)³

Given a test statistic of t=2.315 of a left tailed test with n=8

Answers

Answer:

Null hypothesis: $\mu =110$

Alternative hypothesis: $\mu \neq 110$

The sample size on this case is n=8, then the degrees of freedom are given by:

$df = n-1= 8-1=7$

The statistic is given by:

$t= (\bar X -\mu)/((s)/(√(n)))$

For this case the value of the statistic is given $t = 2.315$

Since we are using a bilateral test the p value would be given by:

$p_v = 2*P(t_(7)>2.315) =0.054$

And we can use the following excel code to find it:

"=2*(1-T.DIST(2.315;7;TRUE))"

Since the p value is higher than the significance level given we FAIL to reject the null hypothesis. And the best conclusion would be:

0.05<P-value <0.10, fail to reject the null hypothesis

Step-by-step explanation:

Assuming this complete question :"Given a test statistic of t=2.315 of a left-tailed test with n=8, use a 0.05 significance level to test a claim that the mean of a given population is equal to 110.

Find the range of values for the P-value and state the initial conclusion 1 point) 0.05<P-value <0.10; reject the null hypothesis

0.05<P-value <0.10, fail to reject the null hypothesis

0.025 < P-value <0.05; reject the null hypothesis

0.025< P-value<0.05; fail to reject the null hypothesis"

For this case they want to test if the population mean is 110 or no, the systemof hypothesis are:

Null hypothesis: $\mu =110$

Alternative hypothesis: $\mu \neq 110$

The sample size on this case is n=8, then the degrees of freedom are given by:

$df = n-1= 8-1=7$

The statistic is given by:

$t= (\bar X -\mu)/((s)/(√(n)))$

For this case the value of the statistic is given $t = 2.315$

Since we are using a bilateral test the p value would be given by:

$p_v = 2*P(t_(7)>2.315) =0.054$

And we can use the following excel code to find it:

"=2*(1-T.DIST(2.315;7;TRUE))"

Since the p value is higher than the significance level given we FAIL to reject the null hypothesis. And the best conclusion would be:

0.05<P-value <0.10, fail to reject the null hypothesis

Which expression represents 8 less than two times x? A)2x -8. B)8 - 2x C) 8x - 2. D) 2 - 8x

Answers

A is the answer because the two is being multiplied by the x and the eight is being subtracted from that product.

8 less than two times x.

8 less than 2*x

8 less than 2x

= 2x - 8.

Option A.

Choose a scenario that could be represented by 2/5

Answers

Answer:

Step-by-step explanation:

you could spilt a pie into 5 pieces and give someone 2. then you gave them 2/5 of a pie.

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