Answer:
The y-coordinate would be 17.5
Step-by-step explanation:
we know that
A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form
or 
In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin
Let
y ----->material needed in yards
x ----> number of curtains
we know that
For y=5, x=2
Find the value of the constant of proportionality k

substitute the given values of x and y

The linear equation is equal to

If the x-coordinate was 7
then
substitute in the equation x=7 and solve for y


therefore
The y-coordinate would be 17.5
Answer:
0.071 to 0.129
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence interval
, we have the following confidence interval of proportions.

In which
z is the zscore that has a pvalue of
.
For this problem, we have that:
In a sample of 400 voters, 360 indicated they favor the incumbent governor. This means that 400-360 = 40 do not favor the incumbent governor. So 
95% confidence interval
So
, z is the value of Z that has a pvalue of
, so
.
The lower limit of this interval is:

The upper limit of this interval is:

The correct answer is:
0.071 to 0.129
-3x - 3y = 3 ⇒ -3x - 3y = 3
5x + 1y = -17 ⇒ <u>-15x - 3y = 51</u>
<u>12x</u> = <u>-48</u>
12 12
x = -4
5x + y = -17
5(-4) + y = -17
-20 + y = -17
<u>+ 20 + 20</u>
y = 3
(x, y) = (-4, 3)
27 and 90 can both be divided by 9
27 divided by 9 = 3
90 divided by 3= 10
so your answer is 3 over 10