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2 years ago

Help quick please math

Mathematics

2 answers:

zalisa [80]2 years ago

6 0

9 I think cus 9 times a is 48

amm18122 years ago

4 0

Answer:

I think is 9 in

Step-by-step explanation:
because is the line in the middle is 8 in them the B is 9

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According to the website www.collegedrinkingprevention.gov, "About 25 percent of college students report academic consequences o

astraxan [27]

Answer:

The required confidence interval is (3.068,4.732)

Step-by-step explanation:

Consider the provided information.

He plans to use a 90% confidence interval. He surveys a random sample of 50 students. The sample mean is 3.90 alcoholic drinks per week. The sample standard deviation is 3.51 drinks and wants to construct 90% confidence interval.

Thus, n=50, $\bar x$ =3.90 σ=3.51

Now find degree of freedom.

$df=n-1\\df=50-1=49$

The confidence level is 90% and df=49

Therefore,

$\frac{\alpha}{2} =\frac{1-0.90}{2}$

$\frac{\alpha}{2} =0.05$

Now by using t distribution table look at 49 df and alpha level on 0.05.

$t_{\frac{\alpha}{2}} = 1.67653$

Calculate SE as shown:

$SE=\frac{\sigma}{\sqrt{50} }$

$SE=\frac{3.51}{\sqrt{50}}=0.4964$

Now multiply 1.67653 with 0.4964

Therefore, the marginal error is: 1.67653 × 0.4964≈ 0.832

Now add and subtract this value in given mean to find the confidence interval.

$\bar x-E$

Hence, the required confidence interval is (3.068,4.732)

4 0

2 years ago

If y is a positive integer, for how many different values of y is RootIndex 3 StartRoot StartFraction 144 Over y EndFraction End

Lelechka [254]

The value of y will be 18 or 144.

Given information:

The given expression is $\sqrt[3]{\frac{144}{y} }$ .

It is required to find the values of y which are whole numbers.

Now, factorize 144 as,

$144=2\times2\times2\times2\times3\times3\\144=2^3\times2\times3\times3$

So, for the value of given expression to be a whole number, the value of y should be,

$2\times3\times3=18$ or 144.

For the above values of y, the given expression will be,

$\sqrt[3]{\frac{144}{y} }=\sqrt[3]{\frac{144}{18} }\\=\sqrt[3]{8} =2\\\sqrt[3]{\frac{144}{y} }=\sqrt[3]{\frac{144}{144} }\\=\sqrt[3]{1} \\=1$

Therefore, the value of y will be 18 or 144.

For more details, refer to the link:

brainly.com/question/17429689

3 0

2 years ago

Which graph represents the solution set for the quadratic inequality x2 + 2x + 1 > 0

AnnyKZ [126]

we have

$x^{2}+2x + 1 > 0$

we know that

$x^{2}+2x+1=(x+1)^{2}$

$(x+1)^{2}> 0$

two solutions

first solution

$(x+1)> 0$

$x > -1$

the first solution is the interval---------> (-1,∞)

second solution

$-(x+1)> 0$

$-x-1> 0$

$-x> 1$

$x< -1$

the second solution is the interval---------> (-∞,-1)

therefore

the solution is all real numbers except the number $-1$

the answer in the attached figure

8 0

2 years ago

Read 2 more answers

Convert the angle – 1.5 radians to degrees, rounding to the nearest ioth.

mariarad [96]

Answer:

85.9

Step-by-step explanation:

4 0

2 years ago

HELPPP PLEASEEE g(t) = 6 - 1 g -) = -7

DedPeter [7]

t is -1

g ( t ) = 6t-1

g (-1) = 6(-1)-1

= -6-1 = -7

6 0

2 years ago