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3 years ago

Which property is used in the problem below? 2 (x + 4) = 2 x + 8

Mathematics

2 answers:

solong [7]3 years ago

5 0

Answer:

Distributive property

Step-by-step explanation:

see attached for reference

2 (x + 4)

= 2(x) + 2(4)

= 2x + 8

Snowcat [4.5K]3 years ago

3 0

Answer:

Distributive property

Step-by-step explanation:

2 (x + 4) = 2 x + 8

In the equation the distributive property is used as the distributive property distributes a equation by taking common value from the equation.

In the the given equation 2 (x + 4), the 2 is multiplied individually to give 2 x + 8, Which can be reverse back to the previous equation by taking 2 as common from the equation.

The value of x can be find by equating the equation to zero

$2(x+4)=0$

$2x+8=0$

$2x= -8$

$x=$ $\frac{-8}{2}$

$x= -4$

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The National Highway Traffic Safety Administration reported the percentage of traffic accidents occurring each day of the week.

Zigmanuir [339]

Answer:

Hence,

Test statistic $X^{2}$ = 9.269.

p value = 0.148

Sunday= 15.23%, Monday= 12.62%, Tuesday= 13.10%, Wednesday=11.67%,

Thursday= 13.10%, Friday= 16.19%, Saturday= 18.09%.

Step-by-step explanation:

relative observed Expected Chi square

Category frequency(p) $O_{i}$ Ei=total*p $(O-E)^{2}$ $R^{2}_{i} =(O_{i} -E_{i} )^{2} /E_{i}$

1 0.142857143 64.0 60.00 16.00 0.267

2 0.142857143 53.0 60.00 49.00 0.817

3 0.142857143 55.0 60.00 25.00 0.417

4 0.142857143 49.0 60.00 121.00 2.017

5 0.142857143 55.0 60.00 25.00 0.417

6 0.142857143 68.0 60.00 64.00 1.067

7 0.142857143 76.0 60.00 256.00 4.267

Total 1.000 420 420 556 9.269

Test statistic $X^{2}$ = 9.269.

p value = 0.148 from excel: chidist(9.269,6)

Percentage %= Frequency of traffic occur on category x 100 / Total number of frequency given.

Category Percentage%

Sunday 15.23%

Monday 12.62%

Tuesday 13.10%

Wednesday 11.67%

Thursday 13.10%

Friday 16.19%

Saturday 18.09%

5 0

3 years ago

Abraham is preparing for a race. He plans to run between 24 and 30 miles a week, either 3 or 4 days a week, and the same number

e-lub [12.9K]

Answer: Abraham could run 8 miles each day for 3 days and get 24. He could run 6 miles each day for 4 days and get 24.

Abraham can run 10 miles each day for 3 days and get 30 or he could run 7.5 miles a day for 4 days and get 30.

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3 0

4 years ago

52.5 ft 25 ft 22 ft 18.18 ft for the picture below

Ugo [173]

Answer:

18.1818181 Feet

Step-by-step explanation:

Divide 27.5 by 20 to establish a ratio between the length and width of the house, then multiply your new ratio by 25. Units do not matter, as long as it's not like 27.5 mm high by .05 ft wide.

6 0

3 years ago

Can anyone help? Will give Brainly + 20 pts .

katen-ka-za [31]

Answer:

She invested 1600 at 8% (to get the shown $160 interest)

and $7400 at 10% (to get the shown 640 interest)

If x = 4000 then $80 interest is x2 again = $160

and so forth $320 interest x 2 again = $640

Step-by-step explanation:

The format would always be for x and then where

investment - x = interest we can work out totals this way and find x.

9000-x = 800 is first equation and substituted into 2nd equation;

0.10x+0.08(9000−x)=800

Use the distributive property to multiply 0.08 by 9000−x.

0.10x+720−0.08x=800

Combine 0.10x and -0.08x to get 0.02x.

0.02x + 720 = 800

Subtract 720 from both sides.

0.02x=800−720

Subtract 720 from 800 to get 80.

0.02x=80

Divide both sides by 0.02.

x= 80 / 0.02

Make decimals numbers = 1 or above.

80 / 0.02 x 100

x= 8000 / 2

x = 4000

3 0

3 years ago

4x3 + 4x2 − 3x − 3 =

Studentka2010 [4]

Answer:

The answer is 14

6 0

4 years ago

Read 2 more answers