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nataly862011 [7]
2 years ago
13

A circle has a diameter of 18 feet. What is the area? Use 3.14 for pi

Mathematics
1 answer:
never [62]2 years ago
4 0

Answer: 254.34

Step-by-step explanation:

3.14 • r^2

Radius = 9

9 • 9 = 81

81•3.14 = 254.34

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Suppose y varies directly as x, and y=14 when x=4. What is the value of y when x=9
Katena32 [7]

Given :-

  • y varies directly as x, and y=14 when x=4.

To Find :-

  • the value of y when x=9 .

Solution :-

<u>A</u><u>c</u><u>c</u><u>o</u><u>r</u><u>d</u><u>i</u><u>n</u><u>g</u><u> </u><u>t</u><u>o</u><u> </u><u>Q</u><u>u</u><u>e</u><u>s</u><u>t</u><u>i</u><u>o</u><u>n</u><u> </u><u>,</u>

  • y = kx ( k is constant )

<u>When</u><u> </u><u>y</u><u> </u><u>=</u><u> </u><u>1</u><u>4</u><u> </u><u>a</u><u>n</u><u>d</u><u> </u><u>x</u><u> </u><u>=</u><u> </u><u>4</u><u> </u><u>,</u>

  • 14 = k(4)
  • k = 14/4
  • k = 7/2

<u>W</u><u>h</u><u>e</u><u>n</u><u> </u><u>x</u><u> </u><u>=</u><u> </u><u>9</u><u> </u><u>,</u>

  • y = 7/2*9
  • y = 63/2
  • y = 31.5
8 0
2 years ago
Find the ratios of 8 and 3 of the perimeters and of the areas ? please some one help me
vagabundo [1.1K]
I don't get what you are asking, please elaborate?
6 0
3 years ago
When the car moves forward by 180cm , each wheel does one full turn . What is the diameter of the wheels to the nearest cm?
Sav [38]
Since 180cm is one full turn you divide it by pie which is 3.14

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3 0
3 years ago
Which inequality is represented by this graph? <br>​
erica [24]

Answer:

x > 4

Step-by-step explanation:

Because x is greater than 4

6 0
2 years ago
Evaluate 3^2 + (7 − 2) ⋅ 4 − 6 over 3
goldfiish [28.3K]

Answer:

7.7

Step-by-step explanation:

we basically follow the BEDMAS rule

1st we workout the bracket (7-2)=5

2nd the exponent 3^2=9

3rd the multiplication (7-2) . 4 = 5 . 4 = 20

4th addition 9+20=29

5th step is subtraction 29-6=23

the final step is dividing 23 by 3, which will become 7.7

6 0
2 years ago
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