All categories

3 years ago

Would f(-7) if f(x) = 8x + 15 does that equal -804??

Mathematics

1 answer:

nydimaria [60]3 years ago

8 0

No it would equal -41

You might be interested in

Larry recorded his time as he ran. What was his average speed from hour 2 to hour 4?

wolverine [178]

Answer:

4-2=2

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

What is the answer to the equation 7/9+1/6+3/5

Andrej [43]

Answer:

Step-by-step explanation:

7/9+1/6+3/5

Least common factor is 90

Multiply

70/90+15/90+54/90

Is 139/90 which is. 1 49/90

6 0

2 years ago

Angle A (6×-1 B 20degrees C (×+14degrees)

Art [367]

First you add all given angles up to equal 180 to give you Times in to equations

A= 125 degrees

C= 35 degrees

I hope I help you and good luck

4 0

2 years ago

Find the work required to move an object in the force field F = e^x + y (1, 1, z) along the straight line from A(0, 0, 0) to B(-

DENIUS [597]

$\vec F(x,y,z)=(e^x+y)(1,1,z)$

is conservative if we can find a scalar function $f$ such that $\nabla f=\vec F$ . This would require

$f_x=e^x+y$

$f_y=e^x+y$

$f_z=(e^x+y)z$

Integrating both sides of the first equation wrt $x$ gives

$f(x,y,z)=e^x+xy+g(y,z)$

Differentiating both sides of this wrt $y$ gives

$f_y=x+g_y=1\implies g_y=1-x\implies g(y,z)=y-xy+h(z)$

but we assumed $g$ was a function of $y$ and $z$ , independent of $x$ . So there is no such $f$ and $\vec F$ is not conservative.

To find the work, first parameterize the path (call it $C$ ) by

$\vec r(t)=(1-t)(0,0,0)+t(-4,5,-5)=(-4t,5t,-5t)$

for $0\le t\le1$ . Then

$\vec r'(t)=(-4,5,-5)$

and the work is given by the line integral,

$W=\displaystyle\int_C\vec F\cdot\mathrm d\vec r=\int_0^1(e^{-4t}+5t,e^{-4t}+5t,-(e^{-4t}+5t)5t)\cdot(-4,5,-5)\,\mathrm dt$

$W=\displaystyle\int_0^1(125t^2+5t+(25t+1)e^{-4t})\,\mathrm dt=\boxed{\frac{2207}{48}-\frac{129}{16e^4}}$

8 0

2 years ago

how many liters of water should be evaporated from 60 liters of a 28% salt solution so that the remaining solution contains 32%

Nitella [24]

The answer is 7.5 liters that should of evaporated

6 0

2 years ago