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mylen [45]
3 years ago
13

A. Is the statement​ "Every elementary row operation is​ reversible" true or​ false? Explain.

Mathematics
1 answer:
Tatiana [17]3 years ago
3 0

Answer:

This statement is "TRUE".

Step-by-step explanation:

Every elementary row operation is reversible. You can get the reverse answer  by multiplying by a constant or by multiplying by its inverse. You can  add one row to another row and subtract row 1 from row 2 to get it back.

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NeverReady batteries has engineered a newer, longer-lasting AAA battery. The company claims this battery has an average life spa
melomori [17]

Answer:

the probability is 0.0202

Step-by-step explanation:

The computation is shown below:

Given that

The Average life span = 17 hours

Standard deviation = 0.8 hours

Sample = 30 batteries

Sample mean = 16.7 hours

Now based on the above information

The probability is

P (\bar x \leq 16.7) = P (\frac{\bar x - \mu}{(\frac{\sigma }{\sqrt{n} } )} \leq  (\frac{16.7 - \mu}{(\frac{\sigma }{\sqrt{n} } )}\\\\= P(z\leq \frac{16.7-17}{\frac{0.8}{\sqrt{30} } } )\\\\= P(\leq -2.05)\\\\= 0.0202

Hence, the probability is 0.0202

4 0
3 years ago
The john boy peanut company produces 145 pound of peanut in day each yard they fill holds 18 ounces of peanut . Each crate they
xeze [42]
145 pounds = 2,320 ounces
2,320 ÷ 18 = 128 jars and some left over in one day
8 0
3 years ago
Please answer thank you
Nina [5.8K]
If x is equaled to 10 then you will place 10 into 3 and it would look like this 3(10) + 5y= 20 now your next step is to multiply 3•10=30 so 30+5y=20 now all you have to do is 20- (-30)= -10 and then divide by 5 and it’s equal to -10/5= -2
5 0
3 years ago
(2,-1);y=-3/2x+6 how do you solve this equation?
alexandr1967 [171]

Answer:

y =  -  \frac{3}{2}x  + 2

Step-by-step explanation:

Assuming the question wants you to write and equation passing through (2,-1); and parallel to y=-3/2x+6.

Then we use the slope intercept form:

y-y_1=m(x-x_1)

We substitute the point and slope to get:

y -  - 1 =  -  \frac{3}{2} (x - 2)

y  + 1 =  -  \frac{3}{2}x - + 3

y =  -  \frac{3}{2}x  + 3 - 1

y =  -  \frac{3}{2}x  + 2

Note that parallel lines have the same gradient.

6 0
4 years ago
5. Solve using an equation:
tatiyna

Answer:

There are 24 boys

Step-by-step explanation:

32-8 = 24

3 0
2 years ago
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