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3 years ago

Please Help!?

Mathematics

2 answers:

White raven [17]3 years ago

7 0

number 48 looks correct

Pepsi [2]3 years ago

3 0

2. 3x45y+3+4 hope that helps i don’t know any others

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If Justin can type 408 words in 4 minutes, how many words can he type per minute?

Pavel [41]

Answer:

102

Step-by-step explanation:

408 words / 4 min = 102 words per min

3 0

3 years ago

Read 2 more answers

Determine an expression for dy<br> dx given that x = sin3<br> (t)andy = cos3<br> (t)

shtirl [24]

Answer:

$\frac{dy}{dx} =-\sqrt[3]{\frac{y}{x} }$

Step-by-step explanation:

Recall that using the chain rule we can state:

$\frac{dy}{dt} =\frac{dy}{dx}*\frac{dx}{dt}$

and therefore solve for dy/dx as long as dx/dt is different from zero.

Then we find dy/dt and dx/dt,

Given that

$x=sin^3(t)\\dx/dt = 3 sin^2(t)* cos(t)$

And similarly:

$y=cos^3(t)\\dy/dt=-3\,cos^2(t)*sin(t)$

Therefore, dy/dx can be determined by the quotient of the expressions we just found:

$\frac{dy}{dx} =\frac{dy/dt}{dx/dt} =\frac{-3\,cos^2(t)*sin(t)}{3\,sin^2(t)*cos(t)} =-\frac{cos(t)}{sin(t)}$

now notice that we can find $cos(t) = \sqrt[3]{y}$ from the expression for y,

and $sin(t) = \sqrt[3]{x}$ from its expression for x.

Therefore dy/dx can be written in terms of x and y as:

$\frac{dy}{dx} =-\frac{cos(t)}{sin(t)}=-\sqrt[3]{\frac{y}{x} }$

4 0

3 years ago

Is y=-2x-1 linear Or nonlinear

vlabodo [156]

I believe it would be linear, correct me if I'm mistaken.

5 0

3 years ago

BRAINLY IF CORRECT!

julsineya [31]

Answer:

1/4x + y = 4

Step-by-step explanation:

y = -1/4x + 4

Add 1/4x on both sides

1/4x + y = 4

I hope this helped and please mark me as brainliest!

5 0

3 years ago

Find an equation for the line with the given properties. Express your answer using either the general form or the slope -interce

Nastasia [14]

Answer:

$y=3x-4$

Step-by-step explanation:

We have been given that the slope of line is 3 and point (2,2) is on the line. We are asked to write the equation of the line passing through the given point in slope-intercept form.

The slope-intercept form of equation is in form $y=mx+b$ , where,

m = slope of line.

b = The y-intercept.

Upon substituting our given slope and coordinates of given point in slope-intercept form, we will get:

$2=3(2)+b$

$2=6+b$

$2-6=6-6+b$

$-4=b$

Now, we will substitute $m=3$ and $b=-4$ in slope-intercept form as:

$y=3x+(-4)$

$y=3x-4$

Therefore, our required equation would be $y=3x-4$ .

3 0

4 years ago