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allochka39001 [22]
3 years ago
10

Using the diagram, explain why y =2x+1 and y=2x-3 have no solutions.

Mathematics
2 answers:
AlekseyPX3 years ago
7 0
Because they have the same inclination so if we try to draw them on a diagram they will be parallel to each other.

Inessa05 [86]3 years ago
3 0
The solutions to an equation are the coordinates of the points that belong to both lines.
The points where the graphs meet belongs to both lines and are solutions to the system of equations.
In our case the lines have the same slope therefore are parallel, so they will never meet so they will have to points that are common to both lines in the same time, so the system of equations given has no solutions.
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A 250-kVA, three-phase, 480-volt transformer requires 75 gallons of insulating oil to keep it properly cooled. How many liters i
Dennis_Churaev [7]

This problem can be directly solved by using a conversion factor. Simple research will tell us that 1 gallon contains about 3.78 Liter. Therefore the volume in Liter is:

volume = 75 gallons * (3.78 Liter / gallon)

<span>volume = 283.5 Liters</span>

7 0
3 years ago
definition of implication: why does P(x) v Q(x) become ~Q(x) -&gt; P(x) rather than ~P(x) -&gt; Q(x)?
insens350 [35]
The easiest way to prove equivalence is to draw out a truth table and then compare the values. I'm going to show a truth table using proposition logic, it's the same result as using predicate logic. 
P(x) v Q(x)

P |Q || PvQ  || ~Q->P  <----Notice how this column matches the PvQ but if you were to 
---|---||--------||----------  <----continue the truth table with ~P->Q it would not be equivalent
T   T      T           T   
T   F      T           T
F   T      T           T
F   F      F           F

Let me know if you would like an example, if the truth table doesn't help. 
6 0
3 years ago
3. Standard deviation is ________. a mean of squared differences the square root of the variance unit-free the covariance 4. Sta
Ksenya-84 [330]

Answer:

3. Standard deviation is the square root of the variance.

4. Standard deviation is useful because it has the same units as the underlying data.

Step-by-step explanation:

3. In statistics, the dispersion in a given data with respect to its mean distribution can be determined or measured by standard deviation and variance. The standard deviation of a distribution can also be determined as the square root of variance.

4. Standard deviation is measured in the same units as that of the original data. Thus it has the same units as the underlying data.

5 0
3 years ago
Please do these thanks. No fake stuff please thanks!
alexandr1967 [171]

Answer:

1) 48p^2+4p-4

2)40b^2-45b+5

3)3p^2-6p+3

4)3v^2-6v+3

5)40x^2+28x+24

6)3x^2+15x+12

Step-by-step explanation:

6 0
3 years ago
Factor 15 + 50.<br> 5(10 + 3)<br> 5(3 + 10)<br> 3(5 + 25)<br> 10(5 + 5)
Agata [3.3K]

Answer:

B

Step-by-step explanation:

So we have the expression:

15+50

Since 5 goes into both 15 and 50, we can factor out a 5. First, rewrite the numbers as:

5(3)+5(10)

Factor out the 5:

=5(3+10)

So, our answer is B

And we're done!

8 0
3 years ago
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