3 years ago

PLS HELP !!!!! :( this is really hard please I need help

Mathematics

1 answer:

Keith_Richards [23]3 years ago

4 0

Answer: At least 13

Step-by-step explanation:

You might be interested in

HELP ME!!!! PLEASE (I have Points)

maw [93]

Answer:

yes pick .98 l

Step-by-step explanation: .

3 0

2 years ago

A mad bull stands 90 feet from a matador. The matador waves her red cape and the bull begins its charge. After 2 seconds, the bu

vichka [17]

15 feet per seconds because within 2 seconds the bull traveled 30 feet.

5 0

3 years ago

A line with a slope of -3 that passes through the point (-2, 6)

scZoUnD [109]

I believe the equation is y = -3x + 0

3 0

3 years ago

Tommy is beginning a science experiment in the lab.the instructions call for 0.322 kilogram of potassium.write 0.322 as a fracti

mars1129 [50]

322/1000
=161/500

The fraction would be 161/500

8 0

3 years ago

Read 2 more answers

Solve the equation. StartFraction dx Over dt EndFraction equals StartFraction 1 Over x e Superscript t plus 7 x EndFraction An i

MAVERICK [17]

Answer:

$\frac{1}{49}(7x-1)e^{7x}+e^{-t}=C$

Step-by-step explanation:

We are given that

$\frac{dx}{dt}=\frac{1}{xe^{t+7x}}$

We have to find the implicit function

Using separation variable method

$\frac{dx}{dt}=\frac{1}{xe^t\cdot e^{7x}}$

By using property $x^a\cdot x^y=x^{a+y}$

$xe^{7x}dx=e^{-t}dt$

By using property $\frac{1}{x^a}=x^{-a}$

Taking integration on both sides

$\int xe^{7x}dx=\int e^{-t}dt$

Parts integration method

$\int u\cdot v dx=u\int vdx-\int (\frac{du}{dx}\int vdx)dx$

By parts integration method

$x\int e^{7x}dx-\int (\frac{dx}{dx}\int e^{7x}dx)dx=-e^{-t}+C$

Using formula $\int e^{ax} dx=\frac{e^{ax}}{a}+C$

$\frac{xe^{7x}}{7}-\frac{1}{7}\int e^{7x}dx=-e^{-t}+C$

$\frac{xe^{7x}}{7}-\frac{1}{49}e^{7x}+e^{-t}=C$

$\frac{1}{49}(7x-1)e^{7x}+e^{-t}=C$

We are given that

$F(x,t)=C$

$F(x,t)=\frac{1}{49}(7x-1)e^{7x}+e^{-t}=C$

8 0

3 years ago