There were 70 people who took the survey. 210 / 70 = 3. So, whatever 40 - 10 is, if we multiply by three, we get the answer. 40 - 10 = 30. 30 x 3 = 90. Simple as that. Hope I could help!
rrriok, the house of... idk
The vertex of the parabola is at (0,0), and the focus is at (0,-7).
The focus is given by the following values:

h and k represent the x and y values of the vertex. We want to solve for p.
Set the y value for the focus equal to -7:

We know that k = 0, so we can simplify to get p by itself:

Standard form of a vertical parabola is given by the following formula:

Plug in all of your known values into the formula:



The answer is
"y^2 = -28x".
Answer:
y = ±√3 and ±2i
Step-by-step explanation:
Given the equation y⁴+y²-12 = 0
(y²)²+y²-12 = 0
Let P = y²
Substitute
P²+P-12 = 0
Factorize:
P²+4P-3P -12 = 0
P(P+4)-3(P+4) = 0
(P-3)(P+4) = 0
P-3 = 0 and P+4 = 0
P = 3 and -4
When P = 3
y² = 3
y = ±√3
When P = -4
y² = -4
y² = ±√-4
y = ±2i
Hence the value of y is ±√3 and ±2i
Answer:
what you do is you want to get the x by it self so you would subtract the x and put it on the other side. like this: 10y=-9-x. OK so you would subtract -9 and put it on the other side like this: 9 + 10y=-x. but you can't have a negative x so u would do -9 + 10y=x.
Step-by-step explanation:
100 + 10h
The 100 represents the $100 and the 10h represents the $10 times the hours