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KATRIN_1 [288]
3 years ago
9

Which equation can be used to solve for z in the following diagram?

Mathematics
1 answer:
marissa [1.9K]3 years ago
7 0
If these are the only choice then it is option 2. There should be another option since it is khan academy.
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What is 75% of 102 2/3
Brut [27]

Answer:

77

Step-by-step explanation:

8 0
2 years ago
A 90% confidence interval for the mean height of students
Westkost [7]

Answer:

ME= \frac{69.397-60.128}{2}= 4.6345 \approx 4.635

And the best answer on this case would be:

b) m = 4.635

Step-by-step explanation:

Let X the random variable of interest and we know that the confidence interval for the population mean \mu is given by this formula:

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

The confidence level on this case is 0.9 and the significance \alpha=1-0.9=0.1

The confidence interval calculated on this case is 60.128 \leq \mu \leq 69.397

The margin of error for this confidence interval is given by:

ME =t_{\alpha/2} \frac{s}{\sqrt{n}}

Since the confidence interval is symmetrical we can estimate the margin of error with the following formula:

ME = \frac{Upper -Lower}{2}

Where Upper and Lower represent the bounds for the confidence interval calculated and replacing we got:

ME= \frac{69.397-60.128}{2}= 4.6345 \approx 4.635

And the best answer on this case would be:

b) m = 4.635

4 0
3 years ago
Use place value to find 12x40
lara [203]
12×40 is 480 that the answer
5 0
2 years ago
The row-echelon form of the augmented matrix of a system of equations is given. Find the solution of the system. FYI it’s not b
sleet_krkn [62]

Answer:

c.

Step-by-step explanation:

From the last row in the matrix z = 1.

From the second row:

y + 5z = -4

y = -4 -5(1) = -9.

From the first row:

x + -1 = -3

x = - 3 + 1

x = -2.

8 0
2 years ago
A local restaurant purchased 45 pounds of flour at a total cost of $38.25 determine the unit cost per pound
xxTIMURxx [149]
$0.85
38.25/45= .85
TO CHECK
.85 times 45 equals 38.25
7 0
3 years ago
Read 2 more answers
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