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tia_tia [17]
2 years ago
11

Someone please help I’m so confused

Mathematics
2 answers:
TEA [102]2 years ago
5 0

Answer:

sorry i cant answer it and it wont let me leave.

Step-by-step explanation:

zalisa [80]2 years ago
3 0
Cross multiply
5(r+5) = 9(r-9)
5r + 25 = 9r - 81
25 = 4r - 81
4r = 106, r = 106/4 = 53/2
The answer is r = 53/2
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The total number of seats in a movie theater is calculated by adding the area of the upper section given by 8x2 and the area of
e-lub [12.9K]
8x^2+6x^2+4x=138  combine like terms on left side

14x^2+4x=138 since the number of seats in the from row is just 4x, subtract 14x^2 from both sides

4x=138-14x^2  that would be the general solution, if you wanted the actual number you would have to solve for x and then multiply that value by 4 to know what "4x" is...

14x^2+4x-138=0

14x^2-42x+46x-138=0

14x(x-3)+46(x-3)=0

(14x+46)(x-3)=0

2(7x+23)(x-3)=0, since x>0

x=3 and thus

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So there are 12 seats in the front row addition.


3 0
3 years ago
A national organization sets out to investigate the change in prevalence of HIV since the last census in 2010. A total of 4,706
nikitadnepr [17]

Answer:

As can be seen, there has been a rise in the proportion of the population with HIV positive, from 7.5% to 9.94%.

Step-by-step explanation:

Given that a national organization sets out to investigate the change in prevalence of HIV since the last census in 2010, ya total of 4,706 participants were interviewed and a total of 468 responses were confirmed to be HIV positive, assuming that the data from the census indicated that the prevalence of HIV in the particular population was 7.5%, to determine if the proportion of the prevalence of HIV has changed (is equal to 7.5%) the following calculation should be performed:

4706 = 100

468 = X

468 x 100/4706 = X

46,800 / 4,706 = X

9.94 = X

Therefore, as can be seen, there has been a rise in the proportion of the population with HIV positive, from 7.5% to 9.94%.

4 0
2 years ago
Pls help asap!!!!!!!!!!!!!!
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I hope this helps you

7 0
3 years ago
A line segment that has one endpoint at the center of a circle and the other endpoint on the circle?
Umnica [9.8K]
What's the actual question? That's the same as the radius of the circle if that's what you're asking
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3 years ago
Read 2 more answers
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