We know that
In any quadrilateral where the vertices are on the circumference of a circle, the opposite angles add up to

degrees.
So,
in this problem

therefore
the answer is
Answer:
Step-by-step explanation:
1. 249-142=107
2. Can't see the other number.
3. Hard to tell.
4. 27,975.215*100=2,797,521.5
5. 42.19 divided by 100 = 0.4219
6. I have no clue.
7. 204 divided by 12 = 17. So, K is 17.
8. Don't know.
9. Don't know
10. a 39.72. b Don't know.
11. a one hundred fourteen and six hundred seventy-four thousandths
b two million six hundred nine thousand two hundred fifty-two and sixty-four thousand eighty-one hundred-thousandths
12. Don't know.
13. 8.85 * 80.3 = 710.655
14. 0.04855 divided by 0.971 = 0.05
15. 0.147696 divided by 0.724 = 0.204
16. 831.5 - 47.79 = 783.71
17. 9.411 + 0.455 = 9.866
18. 558.24 - 541.6 = 16.64. So, E would be 16.64.
19. 6.84 * 0.52 = 7.36
20. 28 * 0.37 = 10.36
Hope this helps! This took me a while.

Actually Welcome to the concept of Geometric Mean (leg) theorem.
So according to the rule, we know that, here altitude = h and left side is 6 and right side is 14 , so we get as,
==> altitude/left = right/altitude
==> h/6 = 14/h
==> h^2 = 14*6
==> h^2 = 84
2.) so now we apply the Pythagoras theorem in triangle ∆DCB
so we get as,
==> (14)^2 + h^2 = a^2
==> 196 + 84 = a^2
==> 280 = a^2
==> a = √280
==> after simplified => a = √70*4
==> a = 2√70 units
hence the correct answer is a => 2√70 units.
The cost of the family rug with dimensions 10-ft-by-11-ft given a proportional relationship is $159.50
<h3>How to solve using ratio?</h3>
Cost = $348.00
Area of rug = length × width
= 15 ft × 16 ft
= 240 square feet
Cost of a new rug = x
Area = length × width
= 10 ft × 11 ft
= 110 square feet
- Equate the ratio of cost to area of both rugs
348 : 240 = x : 110
348/240 = x/110
cross product
348 × 110 = 240 × x
38,280 = 240x
x = 38,280 / 240
x = $159.50
Learn more about ratio:
brainly.com/question/2328454
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