Answer:
(1.5,-2.6)
Step-by-step explanation:
Given the polar coordinates (-3,60°).
Let our Cartesian coordinates be (x,y)
#We know that when converting the rectangular coordinates (x,y) to polar (r,θ), then:
![r=\sqrt{x^2+y^2}\\\\\therefore r^2=x^2+y^2\\\\\theta=tan^{-1}(y/x)\\\therefore tan \theta=y/x](https://tex.z-dn.net/?f=r%3D%5Csqrt%7Bx%5E2%2By%5E2%7D%5C%5C%5C%5C%5Ctherefore%20r%5E2%3Dx%5E2%2By%5E2%5C%5C%5C%5C%5Ctheta%3Dtan%5E%7B-1%7D%28y%2Fx%29%5C%5C%5Ctherefore%20tan%20%5Ctheta%3Dy%2Fx)
#Using the illustration above, we can express our polar coordinates as:
![-3=\sqrt{x^2+y^2}\\\\-60\textdegree=tan^{-1}(y/x}](https://tex.z-dn.net/?f=-3%3D%5Csqrt%7Bx%5E2%2By%5E2%7D%5C%5C%5C%5C-60%5Ctextdegree%3Dtan%5E%7B-1%7D%28y%2Fx%7D)
#Solve simultaneously to solve for x and y:
![(-3)^2=x^2+y^2\ \ \ \ \ \ \ \ \ \ i\\\\tan(-0\texdegree)=y/x\ \ \ \ \ \ \ \ ...ii\\\\y=x\ tan(-60\textdegree)\ \ \ \ \ \ \ ...iii\\\\\#substitute\ y \ in\ i\\\\(-3)^2=x^2+(x \ tan (-60\textdegree))^2\\\\9=x^2+3x^2\\\\x=\sqrt{9/4}=1.5\\\\y=1.5\ tan(-60\textdegree)=-2.5981\approx-2.6](https://tex.z-dn.net/?f=%28-3%29%5E2%3Dx%5E2%2By%5E2%5C%20%5C%20%5C%20%5C%20%5C%20%5C%20%5C%20%5C%20%5C%20%5C%20i%5C%5C%5C%5Ctan%28-0%5Ctexdegree%29%3Dy%2Fx%5C%20%5C%20%5C%20%5C%20%5C%20%5C%20%5C%20%5C%20...ii%5C%5C%5C%5Cy%3Dx%5C%20tan%28-60%5Ctextdegree%29%5C%20%5C%20%5C%20%5C%20%5C%20%5C%20%5C%20...iii%5C%5C%5C%5C%5C%23substitute%5C%20%20y%20%5C%20in%5C%20%20i%5C%5C%5C%5C%28-3%29%5E2%3Dx%5E2%2B%28x%20%5C%20tan%20%28-60%5Ctextdegree%29%29%5E2%5C%5C%5C%5C9%3Dx%5E2%2B3x%5E2%5C%5C%5C%5Cx%3D%5Csqrt%7B9%2F4%7D%3D1.5%5C%5C%5C%5Cy%3D1.5%5C%20tan%28-60%5Ctextdegree%29%3D-2.5981%5Capprox-2.6)
Hence, the Cartesian coordinates are (1.5,-2.6)
Answer:
The formula for the volume of a prism is V=Bh , where B is the base area and h is the height. The base of the prism is a rectangle. The length of the rectangle is 9 cm and the width is 7 cm.
Step-by-step explanation:
1)Write down the formula for finding the volume of a rectangular prism. The formula is simply V = length * width * height.
2)Find the length.
3)Find the width.
4)Find the height.
5)Multiply the length, the width, and the height.
6)State your answer in cubic units.
Answer:
(
h
∘
f
∘
g
)
(
x
)
is known as a composite function. Here's how composite functions work:
let's say that
x
=
1
. Your function
g
(
x
)
=
1
3
(
x
)
now produces a
y
output of
1
3
, since
g
(
1
)
=
1
3
(
1
)
. Within a composite function, the y-value of one function becomes the x-value of the next, like so:
g
(
1
)
=
1
3
⇒
f
(
1
3
)
=
17
3
⇒
h
(
17
3
)
=
17
Therefore,
(
h
∘
f
∘
g
)
(
1
)
=
17
Based on this, to find the function for
(
h
∘
f
∘
g
)
(
x
)
(combined from right to left, by the way), simply replace
x
in
f
(
x
)
with the function
g
(
x
)
, and replace
x
in
h
(
x
)
with the function of
(
f
∘
g
)
(
x
)
, to get
(
h
∘
f
∘
g
)
(
x
)
.
This, simplified, is equal to
2
x
+
15
, and therefore
(
h
∘
f
∘
g
)
(
1
)
=
2
(
1
)
+
15
=
17
Hope that helps!
Answer:
$255
Step-by-step explanation:
Using the information provided, in order to find Marco's starting balance we simply need to add all of his transaction costs together. Once we have this value we simply add it to his ending balance amount which will give us the total dollar value of his starting balance.
20 + 22 + 13 + 39 + 34 + 15 + 31 = 174
174 + 81 = $255
Finally, we can see that Marco's starting balance was a total of $255
Answer:
9,000
Step-by-step explanation:
1 km=1,000
9*1,000=9,000