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4 years ago

What is the value of b?

Mathematics

1 answer:

Tresset [83]4 years ago

8 0

Look at the picture.

d° + c° = 2 · 68° = 136°

b° = 360° - (136° + 104°) = 360° - 240° = 120°

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2.<br> If 2x - 7 = 19, then x =

Rainbow [258]

Answer:

X = 13

Step-by-step explanation:

Add 7 to both sides

2x = 26

divide by 2

x = 13

3 0

3 years ago

Bob Nale is the owner of Nale's Quick Fill. Bob would like to estimate the mean number of gallons of gasoline sold to his custom

Mnenie [13.5K]

<h2>Answer with explanation:</h2>

As per given , we have

$\ovreline{x}=8.17$

$\sigma=2.2$

n= 64

a) Since , the sample mean is the point estimate for the population mean.

Therefore, the point estimate of the population mean = $\ovreline{x}=8.17$

b) Critical z-value for 99% confidence : $z_{\alpha/2}=2.576$

Confidence interval :

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

$8.17\pm (2.576)\dfrac{2.2}{\sqrt{64}}$

$8.17\pm 0.7084$

$(8.17-0.7084,\ 8.17+0.7084)=(7.4616,\ 8.8784)\approx (7.46,\ 8.88)$

Hence, the 99 percent confidence interval for the population mean is between 7.46 and 8.88.

8 0

3 years ago

How do you divide can someone plz tell me

hodyreva [135]

Just divide
Like 4:2=2

7 0

3 years ago

Read 2 more answers

Need help ASAP

Natalija [7]

Answer:

Step-by-step explanation:

We need to use two points on the line: (0,50) and (2,100).

Then, we find the slope with the formula

$m=\frac{y_{2}-y_{1} }{x_{2} -x_{1} }\\ m=\frac{100-50}{2-0}=\frac{50}{2}=25$

Then, we use the point-slope formula to find the equation

$y-y_{1} =m(x-x_{1} )\\y-50=25(x-0)\\y=25x+50$

Therefore, the right answer is B.

8 0

4 years ago

Read 2 more answers

There is a line that includes the point (4, 1) and has a slope of 1/4. what is its equation in

Lelechka [254]

Answer:

y=1/4x

Step-by-step explanation:

y=mx+b

m=1/4

so, y=1/4x+b

Now, look at our line's equation so far: . b is what we want, the 1/4 is already set and x and y are just two "free variables" sitting there. We can plug anything we want in for x and y here, but we want the equation for the line that specfically passes through the the point (4,1).

So, why not plug in for x the number 4 and for y the number 1? This will allow us to solve for b for the particular line that passes through the point you gave!.

(4,1). y=mx+b or 1=1/4 × 4+b, or solving for b: b=1-(1/4)(4). b=0.

y=1/4x+0

3 0

3 years ago