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Murljashka [212]
3 years ago
15

What is the domain of the function below? (-2,5)(-1,10)(4,5)(2,6)

Mathematics
1 answer:
Trava [24]3 years ago
4 0

Answer: x={-2, -1, 2, 4}

Step-by-step explanation: The domain is all of the x-values in an equation. When you record the domain, you have to put all of the values in least to greatest order.

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If y varies inversely as the square of x, and y=7/4/ when x=1, find y when x=3
e-lub [12.9K]
Y varies inversely as the square of x. So we can write the relation between x and y as:

y= \frac{k}{ x^{2} }

where k is a constant of proportionality. It is given that y = 7/4 when x = 1.
Using these values, we can write:

\frac{7}{4}= \frac{k}{1} \\  \\ 
k=  \frac{7}{4}

So, now the equation in terms of x and y can be written as:

y= \frac{7}{4 x^{2} }

We are to find y when x = 3. So we can write:

y= \frac{7}{4(9)}=\frac{7}{36}

Thus, for x= 3 value of y will be 7/36
6 0
4 years ago
A plane flying at a certain altitude is observed from two points that are 2.2 meters apart. The angles of elevation made by the
lana [24]
tan(72)= \frac{y}{x}  ; tan(55)= \frac{y}{2.2 + x}
y=xtan(72);y=(2.2+x)tan(55)
So we are to merge the two equations into one, since both of the equations are equal to y. a = b, b = c therefore, a = c.
xtan(72)=2.2tan(55)+xtan(55)
We are to isolate x.
x[tan(72)-tan(55)]=2.2tan(55)
x=\frac{2.2tan(55)}{tan(72)-tan(55)}
The value of x is approximately, 1.9047m
Then, substitute the value of x from y=xtan(72)
y=1.9047tan(72)
y = 5.862m
Round up, then the answer would be D.

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frosja888 [35]

Answer:

1 mile per minute just divide

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