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denis23 [38]
3 years ago
11

Help me please someone

Mathematics
1 answer:
Zigmanuir [339]3 years ago
5 0

9514 1404 393

Answer:

  x = 150

Step-by-step explanation:

The sum of the exterior angles of a convex polygon is 360°.

  65° +80° +72° +(x -7)° = 360°

  x = 150 . . . . . . divide by °, subtract 210

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Naddik [55]

Answer:

the answer is 1260 degrees

pleases mark me the brainliest!

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3 years ago
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Please i need help with this one​
swat32

Answer:

Step-by-step explanation:

use formula

F = 1/2*sqrt[ 4* r^2 -CD^2 ]  

F = 4.4721

4 0
3 years ago
Train A and Train B start off at the same point and are traveling in the same direction. It takes Train A 30 minutes to get to S
kaheart [24]

Answer:

No difference

Step-by-step explanation:

The given parameters are;

The point Train A starts off = The point Train B starts off

The direction of travel of Train A = The direction of travel of Train B

The time it takes Train A to get to Station X, t₁ = 30 minutes = 0.5 hour

The speed of Train A, v₁ = 100 miles per hour

The time it takes Train B to get to Station Y, t₂ = 100 minutes = (5/3) hours

The speed of Train B, v₂ = 30 miles per hour

The distance from the starting point to Station X, d₁, is given as follows;

v₁ = d₁/t₁

∴ d₁ = v₁ × t₁

By substituting the known values, we have;

d₁ = 100 mph × 0.5 h = 50 miles

The distance from the starting point to Station Y, d₂, is given as follows;

v₂ = d₂/t₂

∴ d₂ = v₂ × t₂

By substituting the known values, we have;

d₂ = 30 mph × (5/3) h = 50 miles

Therefore;

The difference in the distances to Station X and Station Y = d₁ - d₂

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6 0
3 years ago
SEE QUESTION IN IMAGE
r-ruslan [8.4K]

d.30

Answer:

Solution given:

x. \:\:\: f. \:\:\: fx

13. \:\:\: 15. \:\:\: 195

14.\:\:\: 42 \:\:\: 588

15. \:\:\: x. \:\:\: 15x

16. \:\:\: 10. \:\:\: 160

17. \:\:\: 3. \:\:\: 51

. n=70+x. \sum=994+15x

we have

mean=sum/n

14.44=\bold{\frac{\sum}{n}}

14.44=\bold{\frac{994+15x}{70+x}}

doing crisscrossed multiplication

(70+x)*14.44=994+15x

1010.8+14.44x=994+15x

15x-14.44x=1010.8-994

0.56x=16.8

x=16.8/0.56

x=30

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3 years ago
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The camera melissa wanted for her birthday is on sale at 27​%off the usual price. theamount of the discount is ​$99.90.what was
ikadub [295]

divide the discount by the percentage off

 so:

99.90/0.27 = 370

 the original price was 370 dollars

7 0
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