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expeople1 [14]
3 years ago
12

The difference between the digits of a two digit number is 1. The number itself is more than 5 times the sum of the digits. If t

he unit digit is greater than the tens digit, find the number.
I need the workings please
Mathematics
1 answer:
adoni [48]3 years ago
7 0
Xy is the number (doesn't mean x times y)
y-x=1

10x+y>5(x+y)
x<y
y-x=1
y=x+1

10x+y>5(x+y)
10x+y>5x+5y
minus (5x+y) from both sides
5x>4y
sub x+1 for y
5x>4(x+1)
5x>4x+4
minus 4x
x>4
y=x+1
y>5
the number can be
56,67,78,89

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Ms. Carr's Class Is Selling Magazines To Raise Money For A Field Trip. The Students In The Class Device They Wanted To Make 5.50
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Here you are giving only the amount they want to raise (namely profit times number of magazines sold), and here you are also giving Money they want to raise... So clarifying, the money they want to raise, should include the money they will spend on buying the magazines (there is no statement saying they found them, or were given the magazines, so a cost should be involved) 

Now if they are only making the count of "Field trip costs X amount of money, and given we have to make a profit of $5.5, How many must we sell?" then the equation should be n=X/5.5 

Should the story be, how much money must they raise to have a profit of 5.5 on each magazine and still have enough for the field trip, then you have a different equation which varies only in adding the cost of each magazine, either case, M should be defined not as money they need to raise (cause here they will be short on their goal) but Money they must earn. And again, you should rewrite your equation to be: 

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C+p=M/n 

And rewriting the previous they should make: 

n(C+p)=M -----> n(C+5.5)=M <span>m/n = 5.50 </span>
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6 0
2 years ago
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Which expression is equivalent to 2−35,? Choose 1 answer:
sleet_krkn [62]

Answer:

The answer is option A.

Step-by-step explanation:

2 - 35 can be written as 2 + (-35) since in 2+( -35) when the bracket is removed it becomes 2 - 35.

Hope this helps

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A doctor wants to research if there is any difference in the birth weights of a mother's first child and second child. Suppose t
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Answer:

There is not sufficient evidence to conclude that there exists significant difference in the birth weights of a mother's first child and second child at 10% level of significance.

Step-by-step explanation:

When our p-value exceeds level of significance then we fail to reject our null hypothesis. In this scenario we are investigating if there exists significant difference in the birth weights of a mother's first child and second child and our null hypothesis is there exists no significant difference in the birth weights of a mother's first child and second child i.e.μd=0.

As we are given that p-value is greater than 10% level of significant so, we cannot reject our null hypothesis. Thus, the conclusion statement can be written as "There is not sufficient evidence to conclude that there exists significant difference in the birth weights of a mother's first child and second child at 10% level of significance."

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