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pshichka [43]
3 years ago
14

What kind of angel is it?​

Mathematics
1 answer:
LenKa [72]3 years ago
4 0

Answer:

90°> =Acute

90°< =Obtuse

(90°= )= Right

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A stadium has 49,000 seats. Seats sell for ​$28 in Section​ A, ​$16 in Section​ B, and ​$12 in Section C. The number of seats in
romanna [79]

Answer:

  • A: 24,500
  • B: 14,300
  • C: 10,200

Step-by-step explanation:

Section A seats comprise half the seats in the stadium, so revenue from those seats at a sold-out event will total ...

  $28 × 49,000/2 = $686,000

Then the remaining revenue of $1,037,200 -686,000 = $351,200 will come from some mix of B and C seats.

__

If all of the seats were C seats, the revenue would be ...

  $12 × 24,500 = $294,000

Actual revenue from those seats is $351,200 -294,000 = $57,200 more. Since each B seat contributes $4 more, there must be ...

  $57,200 / $4 = 14,300 . . . . B-section seats

Then the number of C-section seats is 24,500 -14,300 = 10,200.

There are 24,500 Section A seats, 14,300 Section B seats, and 10,200 Section C seats.

_____

You could write 3 equations in 3 unknowns and get the same answer.

  a + b + c = 49000 . . . . . where a, b, c are numbers of seats in A, B, and C

  a - b - c = 0

  28a +16b +12c = 1037200

The solution by your favorite method is (a, b, c) = (24500, 14300, 10200), as above.

5 0
3 years ago
SOMEONE PLEASE HELP MEEEEEEEEEEEEEEEEEE
Anna [14]

Answer:

y = -(5/2)x - 1

Step-by-step explanation:

slope intercept form is y = mx + b

m is the slope

b is the y intercept

The y intercept is shown to be (0,-1), so b = -1

The equation is now y = mx -1

slope= rise/run

The rise is (4-(-1))=5

The run is (-2-0)=-2

5/-2 is the slope (m)

The equation is y = -(5/2)x - 1

5 0
3 years ago
Read 2 more answers
Choose the best answer from among choices below. A police department wants to find out if a correlation exists between x = the n
ira [324]
∑x = 5 + 7 + 8 + 4 + 11 + 12 + 8 + 7 = 62
(∑x)^2 = 62^2 = 3,844
x bar = 62 / 8 = 7.75
∑x^2 = 25 + 49 + 64 + 16 + 121 + 144 + 64 + 49 = 522

∑y = 79 + 82 + 83 + 81+ 86 + 89 + 91 + 84 = 675
(∑y)^2 = 455,625
y bar = 675 / 8 = 84.375
∑y^2 = 6,241 + 6,724 + 6,889 + 6,561 + 7,396 + 7,921 + 8,281 + 7,056 = 57,069

∑xy = 395 + 574 + 664 + 324 + 946 + 1,068 + 728 + 588 = 5,287
 
r = (∑xy - n(x bar)(y bar)) / (sqrt(∑x^2 - n(x bar)^2) sqrt(∑y^2 - n(y bar)^2)) = (5,287 - 8(7.75)(84.375)) / (sqrt(522 - 8(7.75)^2) sqrt(57,069 - 8(84.375)^2)) = (5,287 - 5,231.25) / (sqrt(522 - 480.5) sqrt(57,069 - 56,953.125)) = 55.75 / (sqrt(41.5) sqrt(115.875)) = 55.75 / 69.3456 = 0.8039




3 0
3 years ago
PLS HELP ME!
valentina_108 [34]

Answer:

what is this language

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Vincent goes to the gym for 30 minutes every day. He starts a new exercise routine on a Monday and uses a function to model the
Sedbober [7]

Complete question is;

Vincent goes to the gym for 30 minutes every day. He starts a new exercise routine on a Monday and uses a function to model the amount of calories he has used, f(d), as a function of the number of days, d, he has exercised with the new routine.

Which statement represents a correct interpretation of f(d) ?

A. f(5) = 150 means Vincent has exercised for a total of 150 minutes after the fifth day of exercising with his

new routine

B. f(10) = 3500 means Vincent will use 3,500 calories on day 10 of exercising with his new routine.

C. f(15) = 5250 means after 15 days of exercising with his new routine, Vincent has used 5,250 calories.

D. f(30) = 10500 means the number of calories Vincent has used times 30 is equal to 10,500

Answer:

Option A: f(5) = 150 means Vincent has exercised for a total of 150 minutes after the fifth day of exercising with his

new routine .

Step-by-step explanation:

We are told that f(d), is a function of the number of days, d, he has exercised with the new routine.

We are also told that he goes to the gym for 30 minutes daily.

Thus;

For option A, f(5) means that he went to the gym for 5 days. At 30 minutes per day means he exercised for a total of: 30 × 5 = 150 minutes. So option A is correct

For option B, f(10) means that he went to the gym for 10 days. At 30 minutes per day means he exercised for a total of: 30 × 10 = 300 minutes. Thus, option B is wrong

For option C, f(15) means that he went to the gym for 15 days. At 30 minutes per day means he exercised for a total of: 30 × 15 = 450 minutes. Thus, option C is wrong.

For option D, f(30) means that he went to the gym for 30 days. At 30 minutes per day means he exercised for a total of: 30 × 30 = 900 minutes. Thus, option D is wrong.

8 0
3 years ago
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