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2 years ago

9

HELPPPP ME PLSSS DUE IN 10 MINS FOR 20 POINTS

2 answers:

sergiy2304 [10]2 years ago

8 0

Answer: 3/5

Step-by-step explanation:

Probabilty of blue tiles: 12/20 =3/5

Probability of letter b tiles: 10/20= 1/2

How to get the denominator?

4+6=10

2+8=10

10+10=20

Marina86 [1]2 years ago

7 0

Answer:

70%

Step-by-step explanation:

Let's list the 4 types of tiles by color and letter:

4 blue tiles with A

6 red tiles with A

2 red tiles with B

8 blue tiles with B

total number of tiles: 4 + 6 + 2 + 8 = 20

Number of tiles that are either blue or have the letter B (lines in bold above) = 14

p(blue or B) = 14/20 = 7/10 = 7/100 = 70%

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what algebraic expression must be added to the sum of 3x squared + 4x + 8 and 2x squared -6x + 3 to give 9x squared -2x - 5 as t

gregori [183]

<span>3x^2 + 4x + 8 + 2x^2 - 6x + 3 to give result as 9x^2 -2x - 5

</span>3x^2 + 4x + 8 + 2x^2 - 6x + 3
= 5x^2 - 2x + 11

so

9x^2 -2x - 5 - (5x^2 - 2x + 11)
= 9x^2 -2x - 5 - 5x^2 + 2x - 11
= 4x^2 -16

answer

expression (4x^2 -16) must be added to the sum of (3x^2 + 4x + 8) and (2x^2 - 6x + 3) to give the result as (9x^2 - 2x - 5)

3 0

3 years ago

A system of inequalities is graphed below. The variable x represents the number of cans someone is buying, and y represents the

8090 [49]

We have that
<span>We will analyze each case to verify the answer
see the attached figure

</span>Point A) 7 cans and 140 bottles------------> (x,y)=(7,140)----> is not solution
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Point C) 8 cans and 120 bottles------------> (x,y)=(8,120)----> is a solution
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the answer is
the solutions are
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6 0

2 years ago

Which is the x-intercept of the graph of the equation y=3x−9?

padilas [110]

Y=3x−9

y=3(0)-9

y=9

Now plug in y to solve for x.

y=3x−9

9=3x-9

18=3x

6=x

The x-intercept is (6,0)

3 0

2 years ago

PLS HELP WILL GIVE BRANLIEST In the first event, the eighth graders are running a baton relay race with three other classmates.

never [62]

Answer:

Total time = 56.81/60 + 59.22/60 + 57.39/60 + 60.11/60 = 3.89 minutes

Average Time in Minutes = 3.89 min / 4 = 0.97 minutes

Average Time in Seconds = 0.97 *60 = 58.38 Seconds

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

Consider the following hypothesis test. H0: μ ≥ 55 Ha: μ < 55 A sample of 36 is used. Identify the p-value and state your con

Ket [755]

Answer:

Step-by-step explanation:

Given that:

$H_o: \mu \ge 55 \ \\ \\ H_1 : \mu < 55$

(a) For x = 54 and s = 5.3

The test statistics can be computed as:

$Z = \dfrac{\overline x - \mu}{\dfrac{s}{\sqrt{n}} }$

$Z = \dfrac{54-55}{\dfrac{5.3}{\sqrt{36}} }$

$Z = \dfrac{-1}{\dfrac{5.3}{6} }$

Z = -1.132

degree of freedom = n - 1

= 36 - 1

= 35

Using the Excel Formula:

P-Value = T.DIST(-1.132,35,1) = 0.1326

Decision: p-value is greater than significance level; do not reject $\mathbf{H_o}$

$Conclusion: \ There \ is \ insufficient \ evidence \ to \ conclude \ that \$ $\mu < 55$

b

For x = 53 and s = 4.6

The test statistics can be computed as:

$Z = \dfrac{\overline x - \mu}{\dfrac{s}{\sqrt{n}} }$

$Z = \dfrac{53-55}{\dfrac{4.6}{\sqrt{36}} }$

$Z = \dfrac{-2}{\dfrac{4.6}{6} }$

Z = -2.6087

degree of freedom = n - 1

= 36 - 1

= 35

Using the Excel Formula:

P-Value = T.DIST(-2.6087,35,1) =0.0066

Decision: p-value is < significance level; we reject the null hypothesis.

$Conclusion: \ There \ is \ sufficient \ evidence \ to \ conclude \ that$ $\mu < 55$

c)

For x = 56 and s = 5.0

The test statistics can be computed as:

$Z = \dfrac{\overline x - \mu}{\dfrac{s}{\sqrt{n}} }$

$Z = \dfrac{56-55}{\dfrac{5.0}{\sqrt{36}} }$

$Z = \dfrac{56-55}{\dfrac{5.0}{\sqrt{36}} }$

Z = 1.2

degree of freedom = n - 1

= 36 - 1

= 35

Using the Excel Formula:

P-Value = T.DIST(1.2,35,1) = 0.88009

Decision: p-value is greater than significance level; do not reject $\mathbf{H_o}$

$Conclusion: \ There \ is \ insufficient \ evidence \ to \ conclude \ that \$ $\mu < 55$

6 0

2 years ago