All categories

2 years ago

I need help with elimination the equation is -3x + 2y= 7 and 4x + 4y= -6

Mathematics

2 answers:

LiRa [457]2 years ago

5 0

Answer:

reference attached

hope it helps you <3

Gre4nikov [31]2 years ago

5 0

Answer is (-2;1/2) i solved you can check below. I use elimination method for the solution.

You might be interested in

Which expression represents 12 times a number, n, minus 6?

Ulleksa [173]

Answer:

A. 12n - 6

Step-by-step explanation:

12 times a number which is n so

12n then minus 6 ,

12n-6

hope this helps

6 0

3 years ago

Read 2 more answers

F(x, y, z) = yzexzi + exzj + xyexzk,c: r(t) = (t2 + 4)i + (t2 − 1)j + (t2 − 2t)k, 0 ≤ t ≤ 2(a) find a function f such that f = ∇

exis [7]

$\nabla f(x,y,z)=\mathbf f(x,y,z)=yze^{xz}\,\mathbf i+e^{xz}\,\mathbf j+xye^{xz}\,\mathbf k$

$\dfrac{\partial f(x,y,z)}{\partial x}=yze^{xz}$
$\implies f(x,y,z)=\displaystyle\int yze^{xz}\,\mathrm dx=\dfrac{yz}ze^{xz}+g(y,z)$
$f(x,y,z)=ye^{xz}+g(y,z)$

$\dfrac{\partial f(x,y,z)}{\partial y}=e^{xz}=e^{xz}\dfrac{\partial g(y,z)}{\partial y}$
$\implies\dfrac{\partial g(y,z)}{\partial y}=0\implies g(y,z)=h(z)$
$f(x,y,z)=ye^{xz}+h(z)$

$\dfrac{\partial f(x,y,z)}{\partial z}=xye^{xz}=xye^{xz}+\dfrac{\partial h(z)}{\partial z}$
$\implies\dfrac{\partial h(z)}{\partial z}=0\implies h(z)=C$
$f(x,y,z)=ye^{xz}+C$

8 0

3 years ago

What is the length of a side a? Round to the nearest tenth of an inch.

Galina-37 [17]

Answer:

Step-by-step explanation:

a = 16 inches

NEAREST TENTH: 20

5 0

3 years ago

Determine an approximate value for y if the coordinate (-0.5387 ,y) is on the unit circle

adoni [48]

Answer:

y = 0.8425 or y = -0.8425

Step-by-step explanation:

All points in the Cartesian coordinate system have an x and y coordinate, defined by two perpendicular measurements.

If the point is on the unit circle, then the radius of the circle is defined to be 1 unit, and the corresponding right triangle follows the Pythagorean Theorem.

$a^2+b^2=c^2$