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Zigmanuir [339]
3 years ago
7

The expresssion is also equivalent to the cost of the item? c-0.25 c which expression is also equivalent to the cost of the item

? 1-0.25c 0.25c 0.75c 1-0.75c
Mathematics
1 answer:
MArishka [77]3 years ago
8 0

Answer:

0.75c

Step-by-step explanation:

If we have an expression as:

a*x + b*x

We can see that both terms in the expression, a*x and b*x have an x, so we can call the x a common factor and we can write an equivalent expression as:

a*x + b*x  = (a + b)*x

If we replace, for example, a by 2, b by 3 and x by 4, we can test the expression as:

2*4 + 3*4  = (2 + 3)*4

 8   +  12  = (5)*4

    20        = 20

Therefore, if we have the following expression:

c - 0.25*c

The expression that is equivalent is 0.75c and it is calculated as:

c - 0.25*c = (1 - 0.25)*c

c - 0.25*c = 0.75*c

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Suppose 232subjects are treated with a drug that is used to treat pain and 50of them developed nausea. Use a 0.01significance le
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B

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C

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Step-by-step explanation:

From the question we are told that

    The  sample size is  n  =  232

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    The population proportion is  p  =  0.20  

 

The  null hypothesis is   H_o : p  =  0.20

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=>           t =  \frac{ 0.216 - 0.20 }{ \sqrt{ \frac{ 0.20 (1- 0.20 )}{ 232} } }

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