Y - 4x = 7...y = 4x + 7
now sub 4x + 7 in for y in the other equation
2y + 4x = 2
2(4x + 7) + 4x = 2
8x + 14 + 4x = 2
12x = 2 - 14
12x = - 12
x = -1
y - 4x = 7
y - 4(-1) = 7
y + 4 = 7
y = 7 - 4
y = 3
solution is : (-1,3)
Answer:

Step-by-step explanation:
The function seems to increase at a constant rate of 3 units. This means that the equation that satisfies these points could be that of a straight line.
We use the first two points to find the slope of the line.
(0, -10)
(1, -7)
(2, -4)
The equation of a line is:

Where m is the slope of the line and b is the cutoff point with the y axis.
To find the slope of a line we use the following equation:


So:

The cut point (b) is found by replacing in the previous equation, any of the three points provided and clearing b.


Now we can write the equation of the line sought.

You can verify that the three points provided belong to this equation.
Answer:
This is an example of placebo testing.
Step-by-step explanation:
This is an example of placebo testing in which, the two groups are given two substances that are said to have an effect on the condition that is being treated but one of them is the actual medicine that is being tested while the other one has no real effect over the medical condition. But the volunteers are not given information on which of the medicines is real and which is not, so that this does not affect the outcome of the experiment.
I hope this answer helps.
12598 rounded to 10k = 10000
Answer: $379.69
Step-by-step explanation:
So first we can represent 75% as 3/4 which is easier for me to explain. so first I would do 1200*3/4 which will be 900 then I would do it again until the 5th night so 900*3/4=675 then 675*3/4=506.25 and then 506.25*3/4=379.6875. So Kaylee would sell $379.6875 but we can't do thousandths place so we round to the nearest hundredth so the final answer is
$379.69