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irakobra [83]
4 years ago
14

An archway is modeled by the equation y = -2x2 + 8x. A rod is to be placed across the archway at an angle defined by the equatio

n x − 2.23y + 10.34 = 0. If the rod is attached to the archway at points A and B, such that point B is at a higher level than point A, at what distance from the ground level is point B?
Mathematics
1 answer:
andrey2020 [161]4 years ago
7 0
This is a fun problem!  Just graph the two equations, then see what points the line intersects with the parabola.  Or, set the two equations equal to each other, and solve for the two intersecting points.
Solve for x and y:       -2x+8 = x-2.23y+10.34 
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Answer: It Diego i think please don’t be mad at me if you get it wrong

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Is twenty one hundredths equivalent to one fifth
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Some researchers claim there is an association between taking vitamins and gaining weight. They took a random sample of people l
netineya [11]

Answer:

The probability that he or she has gained weight, given that he or she takes more than one vitamin per day is 0.47

Step-by-step explanation:

                                       Has Gained Weight        Has Not Gained Weight

Does not take vitamins                          52                                   19

Takes one vitamin per day                    35                                   49

Takes more than one vitamin per day 72                                    80

We are supposed to find the probability that he or she has gained weight, given that he or she takes more than one vitamin per day

A= he or she has gained weight

B=he or she takes more than one vitamin per day

P(A|B)=\frac{P(A \cap B)}{P(B)}

A \cap B = 72

B = 72+80=152

So,P(A|B)=\frac{72}{152}=0.47

So, Option C is true

Hence the probability that he or she has gained weight, given that he or she takes more than one vitamin per day is 0.47

6 0
3 years ago
Approximate the value of 11−−√ to the nearest tenths place. Plot the approximation on the number line.
posledela

Step-by-step explanation:

I think your question is missed of key information, allow me to add in and hope it will fit the original one.  

<em>Approximate the value of </em>\sqrt{11}<em> to the nearest tenths place. Plot the approximation on the number line.</em>

(Please have a look at the attached photo)

My answer:

The value nearest tenths place of \sqrt{11} is: 3.3

Hope it will find you well.

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A sweater was discounted by 36%. The amount if the discount was $27. What was the cost of the sweater?
neonofarm [45]

Answer:

The cost of the sweater would be $17.28

5 0
3 years ago
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