Solve the proportion using cross products. Round to the nearest hundredth if necessary.
12Miles/27hours=4miles/Xhours

A. 28
B. 12
C. 9
D. 18

Answers

Answer 1

Answer:

C) x = 9

Step-by-step explanation:

[tex]\frac{12}{27}[/tex] = [tex]\frac{4}{x}[/tex]

[tex]\frac{12}{27}[/tex] ÷ [tex]\frac{3}{3}[/tex] = [tex]\frac{4}{9}[/tex]  This is the fraction simplified

[tex]\frac{4}{9}[/tex] = [tex]\frac{4}{x}[/tex]  Simplified, I think that it is easier to see that x = 9


Related Questions

A random sample of 8 cigarettes of a certain brand has an average nicotine content of 4.2 milligrams and a standard deviation of 1.4 milligrams. Is this in line with the manufacturer’s claim that the average nicotine content does not exceed 3.5 mg? Use a 0.01 level of significance and assume the distribution of nicotine contents to be normal.

Answers

Answer:

0.0793 > 0.01, which means that we have a result in line with the manufacturer's claim.

Step-by-step explanation:

Manufacturer’s claim that the average nicotine content does not exceed 3.5 mg

This means that the null hypothesis is given by:

[tex]H_{0}: \mu = 3.5[/tex]

And the alternate hypothesis is:

[tex]H_{a}: \mu > 3.5[/tex]

The test statistic is:

[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]

In which X is the sample mean, [tex]\mu[/tex] is the value tested at the null hypothesis, [tex]\sigma[/tex] is the standard deviation and n is the size of the sample.

3.5 is tested at the null hypothesis

This means that [tex]\mu = 3.5[/tex]

A random sample of 8 cigarettes of a certain brand has an average nicotine content of 4.2 milligrams and a standard deviation of 1.4 milligrams.

This means that [tex]n = 8, X = 4.2, \sigma = 1.4[/tex]

Value of the z-statistic:

[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]

[tex]z = \frac{4.2 - 3.5}{\frac{1.4}{\sqrt{8}}}[/tex]

[tex]z = 1.41[/tex]

Pvalue of the test:

We are testing if the mean is higher than 3.5.

The sample mean found is of 4.2, and we have to find the probability of finding a sample mean at least as large as this, which is 1 subtracted by the pvalue of z = 1.41.

z = 1.41 has a pvalue of 0.9207

1 - 0.9207 = 0.0793

0.0793 > 0.01, which means that we have a result in line with the manufacturer's claim.

PLLLLEEEEAAASSSEEEE HHHEEELLLPPPP!!!!! WILL MARK BRAINLIEST
This table shows the daily high temperatures, in degrees Fahrenheit, for two towns over a 10-day period.

Town A 45 50 42 57 54 53 50 49 47 47
Town B 30 35 43 50 60 68 70 68 40 30
Based on these results, which conclusions can you draw about the temperatures in the two towns over the 10-day period?

Select each correct answer.


On average, Town A is several degrees warmer than Town B during this time period.

On average, Town A is several degrees cooler than Town B during this time period.

On average, the temperatures in the two towns are about the same during this time period.

The temperatures in Town A are more variable than the temperatures in Town B.

The temperatures in Town A are less variable than the temperatures in Town B.

The temperatures for both towns vary by about the same amount.

Answers

Answer:

1 and 5 I think

Step-by-step explanation:

Answer:

1 ANS 5 PROBABLY

Step-by-step explanation:

HELP PLEASE In which table does y vary directly with x

Answers

Answer:

x  y

1   3

2   6

3    9

Step-by-step explanation:

That's the answer for Plato correct!

3 When 25 x+2y-* x-12y+3) x-1ży+3) is simplified, what is the resulting expression? 1 Tox+23y+6 7. x+23y+6 x+85y+8 1 Tox+4*x+3​

Answers

Answer:

B

Step-by-step explanation:

Can someone please help me with this problem?

Answers

Answer:

1120 cm^3

Step-by-step explanation:

Volume of the ice cube = B * h

B = 20 cm^2

h = 4 cm

Volume = 20 * 4 = 80 cm^3

This volume is for one cube holder in the tray.

There are  7 * 2 such holders

There are 14 holders

Total volume of the holders =

14 * 80 =

1120 cubic cm

Help me with this please

Answers

Answer:

That's called a parabola

Step-by-step explanation:

Since it's graphed in a "U" shape

What is x in this equation?

Answers

Answer:

x = 124

Step-by-step explanation:

x = 124 because of alternate exterior angles

X=124 because is the result when you add all the value of x and get answered

Helppp meeee pleaseeeeee

Answers

Answer:

C. Substance C, Substance A, Substance D, Substance B

The midpoint AB is M (1,1). If the coordinates of A are (-3,-3), what are the coordinates of B

Answers

Answer:

(2,−4).

Step-by-step explanation:

Hope this helps and have a wonderful day!!!!

Please help I’ll mark you as brainliest if correct!

Answers

Answer:

18

Step-by-step explanation:

2.5x + 1x= 63

3.5x =63

divide 3.5 by both sides ti get 18

PLEASE HELP ASAP REAL ANSWERS ONLY OR WILL BE DELETED! 20 PTS!!

To the nearest tenth of a centimeter, how tall is a cylinder with a radius of 7.4 cm and volume of 2119.5 cm3 Give the approximate answer rounded to 2 decimal places.

Answers

Step-by-step explanation:

v= 2×pi×r²×h=2119.5cm³

h=2119.5/(2×pi×r²) r=7.4cm

Answer:

12.32cm

Step-by-step explanation:

Volume of cylinder = πr²h

2119.5=π(7.4²)h

h=2119.5/54.76π

h=12.3202666868

h=12.32cm

A=8b+c solve for b
Please help!

Answers

Answer:

(A-c)/8 = b

Step-by-step explanation:

A = 8b +c

A - c = b

(A-c)/8 = b

Hope this helps you!

Question 5 (1 point)
If y varies jointly as x and z and y = 18 when x = 2 and z = 3, find y when x is 5 and z is 6.

Answers

Answer:

y = 90

Step-by-step explanation:

If y varies jointly as x and z, then;

y = kxz

If y = 18 when x = 2 and z = 3

18 = k(2)(3)

18 = 6k

k = 18/6

k = 3

To get y when x = 5 and z = 6

y = kxz

y = 3(5)(6)

y = 15*6

y = 90

Hence the value of y is 90

Is 3(b+c) equivalent expressions?

A. True

B. False

Answers

Answer:

Is 3(b+c) equivalent expressions?

A. True

Answer is: A
Hope this helps :)
Brainliest plzz

Use a net of the square puritans if Jessica ty to find the surface area of pyramid 8 and 8

Answers

Answer:

Step-by-step explanation:

Hhff

Please only answer the odds for example 1. 3. 5. 7. 9. thanks if your answer is a virus or if its absurd i will repo thanks also I am giving brainlest for correct answers(:

Answers

Set A:

1. 1 1/2 - closest to 1

2. 11/24 - closest to 1/2

3. 3/16 - closest to 0

4. 11/24 - closest to 1/2

5. 8/15 - closest to 1/2

6. 49/60 - closest to 1

7. 1 1/10 - closest to 1

8. 31/60 - closest to 1/2

Set B:

1. Common denominator = 10

2. Common demoninator = 18

3. Common denominator = 28

Find the perimeter of this L shape.

Answers

Answer: undefined, not enough information

Step-by-step explanation:

Answer:

15+19 =34 is the perimeter of the closed figure

hope it helped you

Pleaseeeeeee helpppppppppppppppp

Answers

Answer:

itz A

Step-by-step explanation:

Love you hun;)

Can you help me with this work please?

Answers

9514 1404 393

Answer:

  OL = 7

Step-by-step explanation:

Triangle JKL is isosceles and N is the midpoint of JL, so NL = NJ = 14.

Triangle LMN is isosceles and O is the midpoint of NL, so NL = 2(OL).

  OL = NL/2 = 14/2

  OL = 7

__

There is no WY.

What solution equals x^4=81

Answers

Answer:

Step-by-step explanation:

3^4=81

3 to the square root of 4 is 81

3*3*3*3=81

Answer:

Since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

The inverse (opposite operation) of "to the fourth power" is "to the fourth root".

(x^4) ^ 1/4 = 81 ^ 1/4

81 = 3^4

so, (3^4) ^ 1/4 = 3 ^ 1 = 3

by hand: (3^4) 1/4 = 3 ^

(4 × 1/4) = 3^1 = 3

(when you take a power to a power, multiply the exponents.)

Or, do it by calculator. One way of finding the fourth the fourth root is to use ^ (1/4).

ASAP

a golden bar has a mass of 12.5kg. the density of gold is 19.3 g/cm^3. work out the volume of the gold bar. give your answer to correct 3 sf.

Answers

Answer:

647.668 cm³

Step-by-step explanation:

12.5 kg = 12500 g

12500 g/19.3 g/cm³ = 647.668 cm³

The answer is 647.668 cubic centimeters

solve for x please show work... i will give you brainliest

Answers

Answer:

82°

Step-by-step explanation:

total wine of quadrilateral=360°

130+ 46+ 102 +x =360

x=360- 278

x=82°

In parallelogram JKLM if LN=12 find LJ.

Answers

Answer:

LJ=24

Step-by-step explanation:

since half of LJ is LN and LN=12 add 12+12 and you will get 24.


A store owner kept track of how many t-shirts were sold last month. The store sold 28 blue t-shirts, 42 green t-shirts, and 56 white t-shirts. Based on
this data, what is the probability that the next customer will buy a green t-shirt?
A .33
B
.42
50
D) .84
HELPPP

Answers

the answer is A ………………

Can u please give me the real answer I really need help☹️

Answers

Answer:

12,000 g = 12000000 kg

120 cm = 1200 mm

1.2 L = 1200 L

1200 cm = 12 m

0.12 m = 120 mm

Please help I’ll mark you as brainliest if correct

Answers

Answer:

B

Step-by-step explanation:

rewrite the following 7(3+5=___+___​

Answers

Answer:

21+35

Step-by-step explanation:

use distributive property, multiply 7 by the two numbers in the parenthesis

keep the problem though.

Please help me with this!

Answers

Answer:

Step-by-step explanation:

Its going to be a negative

negative, if wrong so sorry

24-5₂

Sorry i tried to put the 2 at the top edge of the 5 but i could not.

Answers

Explanation in this file

\\Workhelp2gow//.com

match it to its definitions !

•ILL GIVE BRAINLIEST !! & 100 POINTS

Answers

Answer:

1) D ; 2) E ; 3) B ; 4) C ; 5) A

Step-by-step explanation:

Answer:

1. Corresponding = D

2. Alt Interior = E

3. Vertical = B

4. Alt Ext = C

5. Straight = A

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