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2 years ago

Solve the following using factoring x²+12=7×

Mathematics

1 answer:

DerKrebs [107]2 years ago

5 0

Answer:

(x-4)(x-3)

Step-by-step explanation:

x^2+12=7x move the 7x to the other side

x^2-7x+12

(x-4)(x-3)

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A researcher is interested in estimating the mean weight of a semi trailer truck to determine the potential load capacity. She t

Kaylis [27]

Answer: 95% confidence interval = 20,000 ± 2.12 $\times$ $\frac{1500}{\sqrt{17} }$

( 19228.736 , 20771.263 ) OR ( 19229 , 20771 )

Step-by-step explanation:

Given :

Sample size(n) = 17

Sample mean = 20000

Sample standard deviation = 1,500

5% confidence

∴ $\frac{\alpha}{2}$ = 0.025

Degree of freedom ( $d_{f}$ ) = n-1 = 16

∵ Critical value at ( 0.025 , 16 ) = 2.12

∴ 95% confidence interval = mean ± $Z_{c}$ $\times$ $\frac{\sigma}{\sqrt{n} }$

Critical value at 95% confidence interval = 20,000 ± 2.12 $\times$ $\frac{1500}{\sqrt{17} }$

( 19228.736 , 20771.263 ) OR ( 19229 , 20771 )

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3 years ago

5. Xian plans to run 14 laps around a track Each lap is 400 yards. So farxian has run 1,680 yards around the track. What percent

Igoryamba

1,680 divided by 400 = 4.2
So we know that Xian has done 4.2 laps.
4.2 divided by 14 = 0.3
0.3 x 100 = 30%
Therefore, Xian has finished 30% of the run

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3 years ago

What's a simplified form of x-1+4+7x-3

Dovator [93]

Ok so right now leave the x's alone. Now add/subtract the numbers without variables which would equal to 0 since -1+4 = 3 and 3-3 =0

now 7x+x =8x so 8x is answer

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3 years ago

-20 = -5 - 3x I need help on this

igor_vitrenko [27]

Answer:

x=5

Step-by-step explanation:

add 5 to both sides

-20+5 = -3x

-15=-3x (divide)

x=5

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3 years ago

A number is multiplied by 6 and the result is 48. Find the number.

eduard

Answer:

the answer is 8

Step-by-step explanation:

8x6=48

7 0

2 years ago

Read 2 more answers

Solve the following using factoring x²+12=7×​

Solve the following using factoring x²+12=7×