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3 years ago

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