A = r² π
254.469 = r² π
r² = 254.469 : 3.14159
r² = 81.00866
r = 9.0048
C = 2 r π = 2 * 9.0048 * 3.14159 = 56.55 units
<h3>★ <u>Required Answer:-</u></h3>
<u>First, what is an equation?</u>
➳ A mathematical statement which shows that two algebraic expressions are equal is called and equation.
Or, LHS = RHS
<u>Example</u>:- 3x - 5 = x + 8
An equation is said to be a linear equation if it contains only one variable (literal) with highest power 1.
_______________________
<u>Solving an equation:-</u>
To solve the equation x + 5 = 7 means to find the value of an unknown algebraic quantity used in the equation.
<u>Example</u>:-
- To solve the equation x + 5 = 7 means to find the value of x.
- To solve the equation 3y + 2 = 9 means to find the value of y.
- To solve the equation means to find the value of a ⠀⠀⠀⠀⠀⠀and so on!
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
★ <u>Rules for solving an equation</u><u> </u><u>by</u><u> </u><u>the</u><u> </u><u>substitution</u><u> </u><u>method</u><u>:</u><u>-</u>
<u>Rule</u> ❶
If x = 2, the value of the expression 3x + 2 = 3 × 2 + 2 = 6 + 2 = 8
<u>Rule</u> ❷
If x = 0, the value of the expression 3x + 2 = 3 × 0 + 2 = 0 + 2 = 2
<u>Rule</u> ❸
If x = -2, the value of the expression 3x + 2 = 3 × -2 + 2 = -6 + 2 = -4
Now consider the algebraic expression 5x - 2y
This expression consists of variables x and y.
Now if :-
- x = 3 and y = 2, 5x - 2y = 5 × 3 2 × 2 = 15 - 4 = 11
- x = 8 and y = 5, 5x - 2y = 5 × 8 - 2 × 5 = 40 - 10 = 30
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The process of finding the value of an algebraic expression by substituting the given value of its variable is called substitution.⠀⠀
Answer:
C
Step-by-step explanation:
They would be 3x more likely to choose football over tennis, since tennis is 13 and football is 39
39/3=13
Final answer is C
Answer:
mark me as a brainlist
Step-by-step explanation:
option for is the right answer I think so
Solution
Part A
The general form of the n-th term = a + (n-1)d
Here we are given the 8th term A8 = 28
, common difference (d) = 6
A8 = a + (n - 1) 6
28 = a + (8- 1)6
28 = a + 7*6
28 = a + 42
a = 28 - 42
a = -14
Part B
n-th term is 760. a = -14 and d = 6.
Plugging in the values in the general form, we get
760 = -14 + (n -1)6
760 = -14 + 6n - 6
760 = -20 + 6n
6n = 760 + 20
6n = 780
Dividing both sides by 6, we get
n = 780/6 = 130
The value of n is 130