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2 years ago

The area of a circle is 28.26 square meters. What is the circle's diameter?

Mathematics

1 answer:

ikadub [295]2 years ago

7 0

Answer: area for circle is πr² so πr² =28.26 and we can sub 3.14 as pi

3.14*r²=28.26 we can divide by 3.14 to get r² on it's own

r²=28.26/3.14

then we root both sides to get r on it's own

28.26/3.14=9 √9=3

and the diameter is double the radius 3*2=6 so the diameter is 6

Step-by-step explanation:

You might be interested in

Seven more than three times a number is twenty-eight.

m_a_m_a [10]

Answer:

7+3n=28 and the answer would be n=7

Step-by-step explanation:

7+3n=28 subtract 7 on both sides, that would leave 3n=21, divide 3 on both sides, the answer would be n=7 if I'm correct. I hope I helped.

7 0

1 year ago

- Let y represent the width of a rectangle and let x represent the rectangle's lengu.

valentina_108 [34]

Answer:

Length: 21 cm and Width: 6cm

Step-by-step explanation:

Let $y$ be the width and $x$ length of the rectangle. We know:

$x = 4y -3$ -------- eq. 1

$54 = 2x + 2y$ (Perimeter of the rectangle) ------- eq. 2

Substitute equation 1 in equation 2:

$54 = 2(4y-3) + 2y\\54 = 8y - 6 + 2y\\54 + 6 = 8y + 2y\\60 = 10 y\\\\\frac{60}{10}= y\\y = 6$

Using the value of y, we find x.

$x = 4y - 3\\x = 4(6) -3\\x= 24 - 3\\x = 21$

4 0

2 years ago

It is 1:45 25min later what time is it

marusya05 [52]

Answer:

The answer is 2:10

Step-by-step explanation:

60 mins in an hour. 1:45+25 is 1:70, turn that into ours and you get 2:10.

3 0

2 years ago

Read 2 more answers

28 = 4/5 x - 8 What value of x makes the equation true?

Harrizon [31]

Answer:

x will have to be 45 to make this true

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

35 POINTS HELP ASAP!!!

Allisa [31]

Answer: 3

Step-by-step explanation:

$3:1$

$\frac{3}{1}=3$

6 0

2 years ago