I did a lot of the questions but I can't figure out these, please help
20. Which equal x=2,y=3
A.y=-2/3x+4
B.y=-3/2x-5
C.y=-3/2x-5
D.y=3/2x+1
12. Which is linear?
A.y=x2(second power)+4
B.y=/x-2 (/=the check point thing, I forgot what it was called XD)
C.y=1/2(x-4)
D.y=2/x+3
4. 6x-24+x=5x-10
17. Function of f(x) is translated 4 units left and 3 units up. which function represents the transformation?
A.g(x)=(x+4)+3
B.g(x)=(x-4)+3
C.g(x)=(x-3)+4
D.g(x)=(x+3)-4
7. |3n+6=21|
11. -3|2x-5|<-9
Math homework help?
2016-02-01 12:08 am
回答 (1)
2016-02-01 12:20 am
20. (Your B and C are the same. Typo, perhaps?) None of these equations for a line will contain the point (2, 3).
12. In a linear function, the variable appears in no power, root, or denominator. C is the only linear function.
4. Simplifies to x = 14. (add 24-5x to both sides)
17. Four units left will replace x with (x+4). If A is supposed to read f(x+4)+3, then it is the proper choice.
7. Perhaps you mean |3n+6| = 21
.. 3n+6 = ±21
.. 3n = 15 or -27
.. n = 5 or -9
11. |2x-5| > 3 ... divide by -3
.. -3 > 2x - 5 > 3 ... separate into two (disjoint) inequalities
.. 2 > 2x > 8 ... add 5
.. 1 > x > 4 ... divide by 2
The solution is x < 1 or 4 < x.
______
Your "check point thing" (√) is the square root symbol. If you can't figure out how to insert it from your keyboard or character viewer, you can get the equivalent by showing a 1/2 power. y = (x-2)^(1/2). Note the use of parentheses.
12. In a linear function, the variable appears in no power, root, or denominator. C is the only linear function.
4. Simplifies to x = 14. (add 24-5x to both sides)
17. Four units left will replace x with (x+4). If A is supposed to read f(x+4)+3, then it is the proper choice.
7. Perhaps you mean |3n+6| = 21
.. 3n+6 = ±21
.. 3n = 15 or -27
.. n = 5 or -9
11. |2x-5| > 3 ... divide by -3
.. -3 > 2x - 5 > 3 ... separate into two (disjoint) inequalities
.. 2 > 2x > 8 ... add 5
.. 1 > x > 4 ... divide by 2
The solution is x < 1 or 4 < x.
______
Your "check point thing" (√) is the square root symbol. If you can't figure out how to insert it from your keyboard or character viewer, you can get the equivalent by showing a 1/2 power. y = (x-2)^(1/2). Note the use of parentheses.
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