jaso saknihh Step-bnswerda po sha jasony-step explanation:
<span>80.925 is the correct answer</span>
Answer :)
- Approximate Circumference = 43.96
- Exact Circumference = 43.982297
Step-by-step explanation:
Formula <u>U</u>sed: C=2πr
Step 1:
Divide Diameter by 2.
14ft / 2ft = 7ft
Radius = 7ft
<u><em>Explanation:</em></u>
The radius is the length from one inner side of a circle to the middle. While the diameter or a circle is the entire length across!
Step 2:
Multiply 7 (radius) times 3.14 (approximate pi) times 2
7 x 3.14 x 2 = 43.96
Approximate Circumference = 43.96
<u><em>Explanation: </em></u>
The question states that you are to find the approximate circumference <u>AND</u> the exact circumference. The difference is pi. You may have seen the pi symbol on your calculator when calculating exact circumference. It looks like this π. But sometimes we are asked to find the "not exact circumference" that is called the 'approximate' circumference. The not so scientific pi is shortened to 3.14.
Step 3:
Multiply 7 times π times 2
7 x π x 2 = 43.982297
Exact Circumference = 43.982297
I hope this helps!
p.s. have any more questions? Post the question and comment the link below!
Ciao!
♥, Sadie
Answer:
x= -7, y= 12
Step-by-step explanation:
To find the value of x and y, first label the 2 equations.
2x +y= -2 -----(1)
x +y= 5 -----(2)
(1) -(2):
2x +y -(x +y)= -2 -5
2x +y -x -y= -7 <em>(</em><em>expand</em><em> </em><em>bracket</em><em>)</em>
x= -7
subst. x= -7 into (2):
-7 +y= 5
y= 5 +7 <em>(</em><em>+</em><em>7</em><em> </em><em>on</em><em> </em><em>both</em><em> </em><em>sides</em><em>)</em>
y= 12
Answer:
x=-3
You multiply what's in parentheses by 3 and to get x by itself you have to subtract 12 from that side which leaves you with 3x= -9. You then divide by 3 to get x=-3. To check this you fill -3 into the equation and you get the correct answer, 3.