All categories

2 years ago

Evaluate the following for the given values. 7xy - y + x - 1 for x = -2 and y = -1

Mathematics

1 answer:

BigorU [14]2 years ago

8 0

After evaluating the given expression, the result would be <em>14 - x.</em>

Hope this helped you! If so, please lmk! Tysm and good luck!

You might be interested in

Please explain how to do this!

irakobra [83]

Ask ur mom she can knows

5 0

3 years ago

There are 9 students in a class: 7 boys and 2girls.

AleksAgata [21]

Answer:

The probability is either 2 but mostly 3 boys.

Step-by-step explanation:

8 0

3 years ago

What is the answer to 72=3/4c

Darina [25.2K]

First, we take the 3/4 and multiply 72 by it's reciprocal, 4/3. Your answer would come to c= 96.

Hope this helped :)

8 0

3 years ago

Is (-1,2) a solution of y=-2x-1

Klio2033 [76]

A solution of a function is where the function hits the x-axis, so if y is any number that is not equal to 0, there is no possible way that point can be a solution.

Hope this helps!

7 0

3 years ago

Read 2 more answers

Suppose that the derivable functions x=x(t) and y=y(t) satisfy xcosy=2.

ololo11 [35]

Applying implicit differentiation, it is found that dy/dt when y=π/4 is of:

a-) -√2 / 2.

<h3>What is implicit differentiation?</h3>

Implicit differentiation is when we find the derivative of a function relative to a variable that is not in the definition of the function.

In this problem, the function is:

xcos(y) = 2.

The derivative is relative to t, applying the product rule, as follows:

$\cos{y}\frac{dx}{dt} - x\sin{y}\frac{dy}{dt} = 0$

$\frac{dy}{dt} = \frac{\cos{y}\frac{dx}{dt}}{x\sin{y}}$

Since dx/dt=−2, we have that:

$\frac{dy}{dt} = -2\frac{\cos{y}}{x\sin{y}}$

When y = π/4, x is given by:

xcos(y) = 2.

$x = \frac{2}{\cos{\frac{\pi}{4}}} = \frac{2}{\frac{\sqrt{2}}{2}} = \frac{4}{\sqrt{2}} \times \frac{\sqrt{2}}{\sqrt{2}} = 2\sqrt{2}$

Hence:

$\frac{dy}{dt} = -2\frac{\cos{y}}{x\sin{y}}$

$\frac{dy}{dt} = -\frac{1}{\sqrt{2}}\cot{y}$

Since cot(pi/4) = 1, we have that:

$\frac{dy}{dt} = -\frac{1}{\sqrt{2}} \times \frac{\sqrt{2}}{\sqrt{2}} = -\frac{\sqrt{2}}{2}$

Which means that option a is correct.

More can be learned about implicit differentiation at brainly.com/question/25608353

#SPJ1

4 0

1 year ago