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Ivahew [28]
3 years ago
15

Angles A and B together create a 90° angle. ∠A = 4x −10 and ∠B = 2x − 20. Find the angle measures (what will

Mathematics
1 answer:
Ahat [919]3 years ago
3 0

Answer:

12 degrees

Step-by-step explanation:

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A food snack manufacturer samples 15 bags of pretzels off the assembly line and weighed their contents. If the sample mean is 9.
Sladkaya [172]

Answer:

9.9-2.14\frac{0.30}{\sqrt{15}}=9.734    

9.9+2.14\frac{0.30}{\sqrt{15}}=10.066    

Step-by-step explanation:

Information given

\bar X= 9.9 represent the sample mean

\mu population mean (variable of interest)

s=0.3 represent the sample standard deviation

n=15 represent the sample size  

Confidence interval

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

The degrees of freedom are given by:

df=n-1=15-1=14

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 and \alpha/2 =0.025, and the critical value wuld be t_{\alpha/2}=2.14

Now we have everything in order to replace into formula (1):

9.9-2.14\frac{0.30}{\sqrt{15}}=9.734    

9.9+2.14\frac{0.30}{\sqrt{15}}=10.066    

3 0
3 years ago
4x-3-3x=12+2x Find x​
Troyanec [42]

Answer: X= -15

Step-by-step explanation:  

Isolate the variable by dividing each side by factors that don't contain the variable.

5 0
3 years ago
At the school cafeteria, you can get 3 slices of pizza for $5.94. At this rate, how much would 7 slices cost, in dollars and cen
gavmur [86]

Answer:

$13.86

Step-by-step explanation:

$5.94 / 3 = $1.98

1 slice = $1.98

7 slices = $1.98 x 7 = $13.86

8 0
3 years ago
Determine the slope of each line (-6,5), (-4,-3)
Tamiku [17]
The slope for those points, as ONE (1) line is: y=-9/2<span>x.</span>
3 0
3 years ago
Use the equation d=z–9 to find the value of d when z=10.<br><br> d=
denis23 [38]

Step-by-step explanation:

d = z - 9

d = 10 - 9  ----> substitute

d = 1

5 0
3 years ago
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