3 years ago

I need help in this!!!!!

Mathematics

2 answers:

professor190 [17]3 years ago

8 0

Cross multiply the denominator with 2 to get

3x -1 = 2(x-4)

3x - 1 = 2x - 8

x = -7

laiz [17]3 years ago

5 0

The answer would be c -7

You might be interested in

Find the mean for the data set. 7, 6, 7, 7, 7, 4, 4, 6, 5, 5, 7

saul85 [17]

Answer:

5.909

Step-by-step explanation:

8 0

3 years ago

Cody has $700 in a savings account that pays 4% simple interest. how much will he have in one year

Vlada [557]

748....to get the answer you need to do 700/0.04%/365= 748

7 0

3 years ago

For the equation given below, evaluate y′ at the point (−2,−1).<br><br> 3xy−3x−12=0.

SSSSS [86.1K]

Answer:

Y'=3xy-3x-12

Y'=F(-2,-1)=0

Step-by-step explanation:

The function of the equation at the point (-2,-1)

is where the equation make the function go to zero:

Y'=3xy-3x-12

Y'=F(-2,-1)=[3(-2)(-1)]-[3(-1)]-12

F(-2,-1)=[6]-[-6]-12

F(-2,-1)=6+6-12

F(-2,-1)=12-12

F(-2,-1)=0

Solving for y

3xy-3x-12=0

y=4/x+x

Making y=0

$\frac{4}{x}+x=0$

$x^{2} =-4$

$x=-2$

So the values make the function go to zero

3 0

2 years ago

Find the directional derivative of the function at the given point in the direction of the vector v. f(x, y, z) = xyz , (3, 3, 9

Anna [14]

The derivative of $f(x,y,z)$ in the direction of a vector $\mathbf u$ is

$\nabla_{\mathbf u}f=\nabla f\cdot\dfrac{\mathbf u}{\|\mathbf u\|}$

With $f(x,y,z)=xyz$ , we get

$\nabla f=(yz,xz,xy)$

and $\mathbf u=(-1,-2,2)$ ,

$\|\mathbf u\|=\sqrt{(-1)^2+(-2)^2+2^2}=3$

Then

$\nabla_{(-1,-2,2)}f(3,3,9)=(27,27,9)\cdot\dfrac{(-1,-2,2)}3=-21$

8 0

3 years ago

1. Which is less? -27 or -36

NikAS [45]

1. -36 is less

2. .12

3. 3.36

I don’t use property’s but u know 8 is the identity property

6 0

3 years ago

Read 2 more answers