<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.
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<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!
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★ <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:
umm I cant show how to graph it but the numbers are 3 pounds of blueberries so 12$ + 3 pounds of strawberry so 9$
12+9=21
Step-by-step explanation:
B (11*11)
D (12*12)
E (15*15)
Answer:
The number of ways he can elect the president,the vice President and the secretary is 1320 ways
Step-by-step explanation:
This is a permutation question.
Any of the 12 members can be the President , when this is done, any of the remaining 11 can be the vice president ,when this is done, any of the remaining 10 can be the secretary.
The required number of ways is;
12*11*10= 1320ways