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loris [4]
3 years ago
14

A circle has a diameter of 10 cm. What is the best approximation of its area?

Mathematics
2 answers:
Darina [25.2K]3 years ago
7 0
Recall that the area of a circle can be determined by the formula pi * r(squared). Since we are given the diameter, we can divide it by 2, giving us the radius. 10 / 2 = 5 Now that we have all of our values, we substitute them into the formula for area. 3.14 * 5(squared) This simplifies to 3.14 * 25 Which gives us 78.5 I hope that helps.
Nutka1998 [239]3 years ago
6 0
I would say <span>78.5
hope that helps!!</span>
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What is the nth term of the geometric sequence 4, 8, 16, 32, ... ?
Morgarella [4.7K]
Geometric is
a_n=a_1r^{n-1}
an=nth term
a1=first term
r=common ratio
n=which term

commmon ratio is like
a1 times r=a2
4 to 8
4 times 2=8
r=2
first term is 4
therefor

a_n=4(2)^{n-1}
the nth term is 4(2)^{n-1}




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3 years ago
What is the variable in the algebraic expression - 9b + 11
vovangra [49]

The variable in this algebraic expression is b

3 0
2 years ago
Read 2 more answers
|(a + b)x + y = 4<br> |x + (a - b)y + 10
leonid [27]

I don't know the answer but try using PEMDAS. (Parentheses, Exponents, Multiplication, Division, Addition, and then Subtraction)

4 0
3 years ago
Find three inequalities that are equivalent to 6x + 2x &gt; 6 (x + 2)
lana66690 [7]

Answer:

x > 6

Step-by-step explanation:

6x + 2x > 6 (x + 2)

       8x > 6 (x + 2)

       8x > 6x + 12

      <u>-6x  -6x</u>

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4 0
2 years ago
I need step by step please 3(x-2)^2+1=13
Romashka-Z-Leto [24]

Answer:

x_{1} = 0. \:  \:  \:  x_{2} = 4

Step-by-step explanation:

3(x - 2)^{2}  + 1 = 3

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{3x}^{2}  - 12x + 12 + 1 = 13

{3x}^{2}  - 12x + 13 = 13

{3x}^{2}  - 12x = 0

x \times (x - 4) = 0

x = 0

x - 4 = 0

\boxed{\green{x_{1} = 0. \:  \:  \:  x_{2} = 4}}

7 0
2 years ago
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