La un concurs de matematica se dau spre rezolvare 6 probleme si pentru fiecare problema rezolvata corect si complet se acorda 7 puncte, pentru fiecare problema gresita sau rezolvata incomplet se scade 10 puncte, iar pentru fiecare problema neacordata se scade un punct. andrei a obtinut la concurs 17 puncte. cate probleme a rezolvat corect?

puteți explica problema mai mult, întrebarea dvs. este confuză, și mi-ar plăcea să vă ajute? :)

the solution is the point

step-by-step explanation:

we have

> equation a

> equation b

adds equation a and equation b

substitute the value of x in equation b to find the value of y

the solution is the point

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: