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08.10.2021 •
Mathematics
I need help I don’t understand
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Ответ:
*Replace each "x" with the required numbers .
1) g (14) ; Ans;
___o_o___
2) f (-8) ; Ans;
___o_o___
3) j (3) ; Ans;
___o_o___
4) h (4) ; Ans;
___o_o___
5) f (2.8) ; Ans;
___o_o___
6) j(-5) ; Ans;
___o_o___
7) g(3/4); Ans;
___o_o__
8) [h(6.2)]² ; Ans;
___o_o___
9) j(2) + g(-3) ; Ans;
___o_o___
10) h(1) - f(-10) ; Ans;
___________o____o__________
**We look at the table. If f(4) or f(-2) is required, it came from f(x) by substitution each x with the required numbers, and the result is in the table f(x) .
***But if he says that f(x) is equal to a number, he means the resulting table f(x) and asks for the "x" that you take from the table "x" .
Table (1) Ans;
f(4) = –3
f(-2) = – 6
If f(x)= -3 ,then x = 4
If f(x) = 1 , then x = 3
___o_o___
Table (2) Ans;
f(4) = –7
f(-2) = 1
If f(x)= -3 ,then x = 0
If f(x) = 1 , then x = - 2
___o_o____
Table (3)Ans;
f(4) = 7
f(-2) = 3
If f(x)= -3 ,then x = 6
If f(x) = 1 , then x = 0
I hope I helped you^_^
Ответ:
answer x=2y-8
Then you substitute 2y-8 for x in the bottom problem. 4(2y-8) - 8y= 10.
Solve for y. you will get a false equation. -32=10. Proved.
B. we know that the lines are parallel. if the line don't have a solution that means that they don't intersect. that means they must be parallel because parallel lines never intersect.