Answer:
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Step-by-step explanation:
Answer:
A, because before x it says -13 which is the slope and 1 because it’s says plus one not minus one
Step-by-step explanation:
Answer A:the number of students who watch 6 to 9 hours of TV
Step-by-step explanation:
Just took the test.
Answer:
z = 7/3 is extraneous.
Step-by-step explanation:
√(z^2+8) = 1 - 2z
z^2 + 8 = (1 - 2z)^2
z^2 + 8 = 1 -4z + 4z^2
3z^2 - 4z - 7 = 0
3z^2 + 3z - 7z - 7 = 0
3z(z + 1) - 7(z + 1) = 0
(3z - 7)(z + 1) = 0
3z = 7, z = -1
z = 7/3, -1.
One of these might be extraneous.
Checking:
√(z^2+8) = 1 - 2z, if z = -1:
√(1 + 8) = 3, -3
1 - 2(-1) = 3. So its not z = -1
if z = 7/3
√((7/3)^2 + 8) = 13.44
1 - 2(7/3) = -3.66
So its z = 7/3
Answer:
A 9 pound package will cost $20.
Step-by-step explanation:
Let p be the number of extra pounds (after 5).
Cost = $8 + 3p
So $8 + 3*4 = $20