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Vanyuwa [196]
2 years ago
12

Using diagonals from a common vertex, how many triangles could be formed from

Mathematics
1 answer:
IrinaK [193]2 years ago
8 0
I am pretty sure it’s 4
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In 1950 the number of retirees was approximately 150 per thousand people aged 20-64. In 1990 this number rose to approximately 2
serg [7]

Answer: 233 people per thousand

Step-by-step explanation:

Using extrapolation method,

if 150/k in 1950,

  200/k in 1990,

  275/k in 2020,

2003 lies in between 1990 and 2020. So, you extrapolate the values of 200/k and 275/k for the years respectively.

Therefore,  

(2003 - 1990)/(2020 - 2003) = (x - 200)/(275 - x)

Where x is the number of retirees per thousand for 2003

Making x the subject of relation in the above equation.

Cross multiply the equation above;

(2003 - 1990)(275-x) = (2020 - 2003)(x - 200)

13(275 - x) = 17(x-200)

3575 - 13x = 17x - 3400

Collect the like terms

3575+3400 = 17x + 13x

30x = 6975

x = 6975/30

x = 232.5

x = 233 people per thousand to the nearest integer

6 0
3 years ago
What is the surface area of this prism? A. 976 cm2 B. 960 cm2 C. 488 cm2 D. 736 cm2
Vikki [24]

Answer:

The answer is C, 488 cm2

Step-by-step explanation:

5 0
4 years ago
Will mark brainliest and 15 points
defon

Step-by-step explanation:

x + y = 9. => 2x + 2y = 18.

2x + 2y = 18

- (2x - 3y = -12)

=> 5y = 30, y = 6.

Therefore x + (6) = 9, x = 3.

The solution is x = 3 and y = 6.

7 0
3 years ago
What are the slope and the y-intercept of the linear function that is represented by the table?
pantera1 [17]
I think the answer is the slope is -2 and the y-intercept is 12
6 0
3 years ago
Read 2 more answers
Simplify radical (1-cos0)(1+cos0)/ cos^2 0<br><br> HELP ME PLS!! ASAP
ycow [4]
That would be tan

(1-cos)(1+cos)=1-cos² which equals to sin²

√sin²/cos²= sin/cos which equals to tan

6 0
3 years ago
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