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3 years ago

What is the answer to number 11 plz show your work

Mathematics

1 answer:

photoshop1234 [79]3 years ago

3 0

54x+14= 43x+36
54x-43x= 36-14
11x = 22 /11
X =2

54*2+14 -= 122
Both the same
And the other are 180-122 = 58

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Please answer, Thank you!

Leto [7]

Answer:

61.5

Step-by-step explanation:

6.755-3311=3444

3444 divded by 56=61.5

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3 years ago

Are the numbers of white and yellow flowers in Cara's arrangements proportional?

liraira [26]

I guess B because there is no other info or a picture.

5 0

3 years ago

Read 2 more answers

4x+12y+4z=-16 12x-12y+8z=8 4x+12y-4z=0

Sergeeva-Olga [200]

I try my best I will be adding other people to help you

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3 years ago

A random sample of 144 observations has a mean of 20, a median of 21, and a mode of 22. The population standard deviation is kno

fomenos

Answer: a. 19.200 to 20.800

Step-by-step explanation:

Formula to find the confidence interval $(\mu)$ :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

, where n is the sample size

$\sigma$ = Population standard deviation.

$\overline{x}$ = Sample mean

$z_{\alpha/2}$ = Two tailed z-value for significance level of $\alpha$ .

Given : Confidence level = 95.44% = 0.9544

Significance level = $\alpha=1-0.9544=0.0456$

Using standard normal z-value table ,

Two tailed z-value for Significance level of 0.0456 :

$z_{\alpha/2}=z_{0.0228}=1.999\approx2$

Also,

n=144

$\sigma= 4.8$

$\overline{x}=20$

Then, the required 95.44% confidence interval for the population mean :-

$20\pm (2)\dfrac{4.8}{\sqrt{144}}\\\\ =20\pm (0.800)\\\\=(20-0.800,\ 20+0.800)=(19.200,\ 20.800)$

Hence, the 95.44% confidence interval for the population mean is 19.200 to 20.800.

8 0

3 years ago

1.)If The simple interest on $1,000 for 2 years is $160, then what is the interest rate?

VARVARA [1.3K]

Answer:

Please see the detailed answer below:

Step-by-step explanation:

1.)

Interest Rate = Interest / (Principal x Time)

Interest Rate = $160 / ($1,000 x 2)

Interest Rate = $160 / $2,000

Interest Rate = 0.08

Interest Rate = 8%

2.)

Interest in 20 Years

Interest = Interest Rate x Principal x time

Interest = 0.09 x $2,000 x 20

Interest = $3,600

Account Balance after 20 Years

Account Balance = Principal + Interest

Account Balance = $2,000 + $3,600

Account Balance = $5,600

Interest in 30 Years

Interest = Interest Rate x Principal x time

Interest = 0.09 x $2,000 x 30

Interest = $5,400

Account Balance after 30 Years

Account Balance = Principal + Interest

Account Balance = $2,000 + $5,400

Account Balance = $7,400

3.)

Interest = Interest Rate x Principal x time

Interest = 0.03 x $7,000 x 3

Interest = $630

Account Balance after 3 Years

Account Balance = Principal + Interest

Account Balance = $7,000 + $630

Account Balance = $7,630

8 0

3 years ago