The coordinate plane is being used in a number of different ways.
It is used on maps to define longitude and latitude. This allows you to define any point on the map using two unique numbers. This is very important in navigation and it made navigation simpler.
It is also used to graph functions. This way we can understand them better, and easier. These are just a couple of implications.
Coordinate plane introduced by Descartes seems like something we take for granted today, but without it, the world would be a very different place.
D is the answer because if you calculate the answer correctly. that will be so.
A = pi × r²
3.14 x 2²
3.14 x 4
A = 12.56636 ≈ 12.56
hopefully this helps u and if u know the formula to solve it, it is super easy
Answer: 2 im pretty sure
Step-by-step explanation:
Make note of the coefficients in the first and fourth equations. They've been conveniently picked so that subtracting one equation from the other eliminates every variable but <em>t</em>. We have
(3<em>r</em> + 2<em>s</em> + <em>t</em> + 2<em>u</em> + 3<em>v</em>) - (3<em>r</em> + 2<em>s</em> + 3<em>t</em> + 2<em>u</em> + 3<em>v</em>) = 7 - 17
-2<em>t</em> = -10
<em>t</em> = 5
