1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
wolverine [178]
3 years ago
9

I need help with math explain how to do it. Thanks! :)

Mathematics
1 answer:
irakobra [83]3 years ago
5 0
For part a it’s sal will leave a $20 tip for part b sals food is $78.22 including tax and tip
You might be interested in
I Need some help pleasee <3
Readme [11.4K]

Answer: 5

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
What is the Laplace Transform of 7t^3 using the definition (and not the shortcut method)
Leokris [45]

Answer:

Step-by-step explanation:

By definition of Laplace transform we have

L{f(t)} = L{{f(t)}}=\int_{0}^{\infty }e^{-st}f(t)dt\\\\Given\\f(t)=7t^{3}\\\\\therefore L[7t^{3}]=\int_{0}^{\infty }e^{-st}7t^{3}dt\\\\

Now to solve the integral on the right hand side we shall use Integration by parts Taking 7t^{3} as first function thus we have

\int_{0}^{\infty }e^{-st}7t^{3}dt=7\int_{0}^{\infty }e^{-st}t^{3}dt\\\\= [t^3\int e^{-st} ]_{0}^{\infty}-\int_{0}^{\infty }[(3t^2)\int e^{-st}dt]dt\\\\=0-\int_{0}^{\infty }\frac{3t^{2}}{-s}e^{-st}dt\\\\=\int_{0}^{\infty }\frac{3t^{2}}{s}e^{-st}dt\\\\

Again repeating the same procedure we get

=0-\int_{0}^{\infty }\frac{3t^{2}}{-s}e^{-st}dt\\\\=\int_{0}^{\infty }\frac{3t^{2}}{s}e^{-st}dt\\\\\int_{0}^{\infty }\frac{3t^{2}}{s}e^{-st}dt= \frac{3}{s}[t^2\int e^{-st} ]_{0}^{\infty}-\int_{0}^{\infty }[(t^2)\int e^{-st}dt]dt\\\\=\frac{3}{s}[0-\int_{0}^{\infty }\frac{2t^{1}}{-s}e^{-st}dt]\\\\=\frac{3\times 2}{s^{2}}[\int_{0}^{\infty }te^{-st}dt]\\\\

Again repeating the same procedure we get

\frac{3\times 2}{s^2}[\int_{0}^{\infty }te^{-st}dt]= \frac{3\times 2}{s^{2}}[t\int e^{-st} ]_{0}^{\infty}-\int_{0}^{\infty }[(t)\int e^{-st}dt]dt\\\\=\frac{3\times 2}{s^2}[0-\int_{0}^{\infty }\frac{1}{-s}e^{-st}dt]\\\\=\frac{3\times 2}{s^{3}}[\int_{0}^{\infty }e^{-st}dt]\\\\

Now solving this integral we have

\int_{0}^{\infty }e^{-st}dt=\frac{1}{-s}[\frac{1}{e^\infty }-\frac{1}{1}]\\\\\int_{0}^{\infty }e^{-st}dt=\frac{1}{s}

Thus we have

L[7t^{3}]=\frac{7\times 3\times 2}{s^4}

where s is any complex parameter

5 0
3 years ago
From a point on the ground 47 feet from the foot of a tree, the angle of elevation to the top of the tree is 35º. Find the heigh
frez [133]

Answer:

Step-by-step explanation:

49.4 degrees

Step-by-step explanation:

In Triangle AXY,

We want to determine the angle of elevation from the point  is standing to the top of the flagpole, which is the angle at V in the diagram.

In Triangle XVY

|VY|=36 feet

Therefore, the angle of elevation from the point  is standing to the top of the flagpole is 49.4 degree to the nearest tenth of a degree.

I think i might of clicked on gthe wrong question sorry

5 0
3 years ago
Portioning a line segment​
harkovskaia [24]

Answer:

the ratio is 2:30 sorry if its incorrect have a nice day

4 0
2 years ago
Miley's music had a sale on music car. All music cars are discounted 15%. Marianas receipt indicates that she saved $3 On her CD
Vedmedyk [2.9K]
Hi there

The price before discount is
P=3÷0.15
p=20

Hope it helps
8 0
3 years ago
Other questions:
  • Which is the equation of a line thag passes through the points (1,-1) and (3,-5)
    7·1 answer
  • Help plz!!!
    11·1 answer
  • PLEASE HELP!!!!!<br> Combine the like terms to create an equivalent expression. 8k+5k
    11·1 answer
  • Amy and her sister are making lemonade for the school dance. Their recipe makes 2 quarts of lemonade. If a serving of lemonade i
    8·2 answers
  • How are three or more angles related
    7·1 answer
  • What is the additive inverse of the complex number 9 – 4i?
    14·1 answer
  • Find the simple interest of $2300 invested at 7.5%for 10years
    9·1 answer
  • Help please!!! ty ;D
    7·2 answers
  • Which point is the intersection of RS and VT?
    8·1 answer
  • 30 people are running for an office to be chosen randomly. You plan to use a 6-sided dice and a spinner. How many sections need
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!