<span>√x^2+2x-10=√x+20
raising both members to the square
</span> x^2+2x-10=x+20
rewriting
x^2+x-30=0
factoring
(x+6)(x-5)=0
therefore the solutions are
<span> x = –6, x = 5
</span>the answer is
<span>B. x = –6, x = 5</span>
put 'm's one side and numbers the other side
Answer:
FGAC 20 JH Н
Step-by-step explanation:
FGAC 20 JH Н
In both cases you may well benefit from graphing the functions.
Do you recognize f(x) = (x + 1)^2 - 1 as a quadratic function, whose graph is that of a parabola that opens up? By comparing this to y = a(x-h)^2 + k, we see that a=1, h= -1 and k = -1. The vertex is at (h,k), which here is the point (-1, -1). This is the minimum value of the function. Thus, the range of this function is [-1, infinity).
Now for the function f(x) = 7x - 11: This is a linear function whose graph is (surprise!) a straight line. When x increases, y increases, without limits to either. Similarly, when x decreases, y decreases.
Thus the range includes all real numbers: (-infinity, infinity).
This question was not correctly written
Complete Question
Tank A initially contained 124 liters of water. It is then filled with more water at a constant rate of 9 liters per minute. Fill in the blank with the amount of water in liters that is in tank a at the given time
How much water is in the tank
after 4 minutes?
How much water is in the tank after 80 minutes ?
Answer:
How much water is in the tank
after 4 minutes?
= 160 liters
How much water is in the tank after 80 minutes ?
= 844 liters
Step-by-step explanation:
Tank A initially contained 124 liters of water. It is then filled with more water at a constant rate of 9 liters per minute.
How much water is in the tank
after 4 minutes?
1 minute = 9 liters
4 minutes = x
x = 9 liters × 4
x = 36 liters
The amount of water in the tank after 4 minutes
= 124 liters + 36 liters
= 160 liters
How much water is in the tank after 80 minutes ?
1 minute = 9 liters
80 minutes = x
x = 9 liters × 80
x = 720 liters
The amount of water in the tank after 4 minutes
= 124 liters + 720 liters
= 844 liters
