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svlad2 [7]
3 years ago
10

True Or False?

Mathematics
1 answer:
natali 33 [55]3 years ago
4 0
Electromagnets are devices that create a magnetic field through the application of electricity. Strong electromagnets are used to lift, move and drop heavy objects, such as vehicles. Electromagnets have advantages over permanent magnets. When the current is switched off, the electromagnet will lose its magnetism. The car will fall back to earth and we need that when we move cars in a junkyard. With a regular ( permanent ) magnet it would be much harder to do.
Answer: A. True

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How many irrational numbers are there between 1 and 6
GarryVolchara [31]
There are an infinite number of irrational numbers between 1 and 6.
3 0
4 years ago
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Suppose that you are interested in estimating the average impact a job training program has on wages. After controlling for obse
Ede4ka [16]

Answer:

False

Step-by-step explanation:

From the question we are told that

The coefficient for the training is r   =  0.55

The standard error is SE  =  1.06

The confidence level is 95%

Generally the level of significant is mathematically represented as

\alpha  =( 100 -95)\%

=> \alpha  = 0.05

Generally the critical value of \alpha  = 0.05 obtained from the normal distribution table is Z_{0.05} =  1.645

Generally the test statistics is mathematically represented as

t  =  \frac{r }{SE}

=> t  =  \frac{0.55}{1.06}

=> t  =  0.5189

Generally given that the t <  Z_{\alpha }

Hence  there is no sufficient evidence to conclude that the program has a positive and statistically significant impact on wages at a 95% confidence level.

So the answer is False

3 0
4 years ago
I need help to solve<br> 5×-2y=-2<br> -×+4y=4
kotegsom [21]

Answer:

x=3 and y=4x=3 and y=4

Step-by-step explanation:

x=3 and y=4

7 0
3 years ago
Solve for x.<br> 4x - 8 = -3(2x + 6)
Alenkinab [10]

Answer:

x= -1

Step-by-step explanation:

First, distribute the -3 through the parentheses

4x-8= -3(2x+6)

= 4x-8= -6x-18

Second, move the variable to the left-hand side and change its sign

4x+6x= -18+8

10x= -10

Divide both sides by 10

x=-1

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Use the graph of the function to find the domain and range of f.
Alik [6]
The domain is the x-values u insert to get corresponding y-values. In other words, the domain is the boundaries for which u can enter x valies. In this graph, we can see that the function continues infinitely upwards, not vertical shifting a bit to the sides. This means that the domain is all x belonging to the set R, since for any x value, we will get a corresponding point on the graph. For the range, it is simply the range of the y-values. From the graph, teh range is -4
5 0
3 years ago
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