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mihalych1998 [28]
3 years ago
12

I'm getting ripped tonight..

Mathematics
2 answers:
larisa [96]3 years ago
6 0
Rip .... Aye aye aye aye aye . I just need points to get my answers
Lisa [10]3 years ago
5 0

Answer:

nice get it bro, I hope you do good

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On the basis of extensive tests, the yield point of a particular type of mild steel-reinforcing bar is known to be normally dist
Aliun [14]

Answer:

Step-by-step explanation:

Given that the yield point of a particular type of mild steel-reinforcing bar is known to be normally distributed with σ = 100

Modified mean without change of sigma = 8439

Sample size n =25

Std error of sample = \frac{\sigma}{\sqrt{n} } \\=1.2

For 90% confidence interval we use Z critical value since we know population std deviation

Margin of error = 1.645(1.2)\\= 1.974

a) Confidence interval

=(8439-1.974, 8439+1.974)\\= (8437.026, 8440.974)

b)For 92% critical value changes to 1.75

Confidence interval

=(8439-1.78(1.2), 8439+1.78(1.2))\\=(8436.864, 8441.136)

8 0
3 years ago
What number is represented by the point plotted on the number line?
Rudiy27

Answer:

1 and 1/2

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
zoey inflates 24 balloons for decorations at the middle school dance. if zoey inflated 15% of the total number of balloons for t
kirill [66]

Answer:

160

Step-by-step explanation:

Divide 24 by 15 percent (.15)

24/.15

=160

5 0
3 years ago
Read 2 more answers
Ahmed solved x/2 - 3 = 6. His result was x = 15
adelina 88 [10]

Part (a)

Let's replace x with 15 and evaluate to see if he is correct or not.

x/2 - 3 = 6

15/2 - 3 = 6

7.5 - 3 = 6  

4.5 = 6

We get a false statement after simplifying everything. We need to get the same number on both sides to get a true statement. Therefore, Ahmed is not correct.

<h3>Answer: No, he is not correct</h3>

===============================================

Part (b)

Let's solve for x. We do so by first adding 3 to both sides, and then multiplying both sides by 2. This follows PEMDAS in reverse, undoing everything to isolate the variable.

x/2 - 3 = 6

x/2 = 6+3 .... add 3 to both sides

x/2 = 9

x = 9*2 .... multiply both sides by 2

x = 18 is the answer

As a check, we'll use the same idea as part (a)

x/2 - 3 = 6

18/2 - 3 = 6

9 - 3 = 6

6 = 6

We get a true statement this time. This confirms x = 18

<h3>Answer: x = 18</h3>
4 0
3 years ago
Read 2 more answers
What is the value of C in the matrix equation below?
lara [203]

Given:

The matrix equation is:

\begin{bmatrix}-18&3&5\end{bmatrix}-C=\begin{bmatrix}-22&1&12\end{bmatrix}

To find:

The value of matrix C.

Solution:

Let A=\begin{bmatrix}-18&3&5\end{bmatrix},B=\begin{bmatrix}-22&1&12\end{bmatrix}. Then the given equation can be rewritten as

A-C=B

-C=B-A

C=-(B-A)

C=A-B

On substituting the values of the matrices, we get

C=\begin{bmatrix}-18&3&5\end{bmatrix}-\begin{bmatrix}-22&1&12\end{bmatrix}

C=\begin{bmatrix}-18-(-22)&3-1&5-12\end{bmatrix}

C=\begin{bmatrix}-18+22&2&-7\end{bmatrix}

C=\begin{bmatrix}-4&2&-7\end{bmatrix}

Therefore, the correct option is C.

6 0
3 years ago
Read 2 more answers
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