Tell whether each sequence is arithmetic. If the sequence is arithmetic, identify the common difference and find the indicated term.
18. -9, -4, 1, 6, 11, ...;a7=?
19. 2, 4, 7, 11, 16, 22, ...; a9= ?
20. -7,-1, 5, 11, 17,...; a6 = ?
21. 1.2, 1.9, 2.6, 3.3, 4.0, ...; a8 = ?
22. 3, 5/2,3/2,-3/2,;a7=?

PLEASE HURRRY THIS REALLY URGENT‼️ SOMEBODY HELP

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step-by-step explanation:

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step-by-step explanation:

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∡ eia and ∡ kij are congruent

step-by-step explanation:

let f (x ) is a function and c be a positive real number,   the graph of the function g (x ) = f (cx ) is represented as follows.

when, c > 1,   the function compresses it in the x - direction.

when, 0 < c < 1, the function stretches it.

the function is g ( x ) = (9x )2.

the heighest power of x in g ( x ) = (9x )2 is 2, so the parent function is square function.

the equation of parent function is f ( x ) = x 2 .

the function is g ( x ) = (9x )2 and the parent function is f ( x ) = x 2 .

so, the functions f and g have the following relationship.

g ( x ) = f ( 9x ).

compare the function g ( x ) = f ( 9x ) with g (x ) = f (cx ).

c = 9 ( > 1 ).

so, the function g (x ) = (9x )2 compresses it in the x - direction.

step-by-step explanation: