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Mumz [18]
3 years ago
12

An electrician charges $100 per visit plus $75/h for house calls. Write an algebraic expression that describes the service charg

es for one household visit. Use your expressions to find the total service charge for a 2.5 –h repair job.
Mathematics
1 answer:
kvv77 [185]3 years ago
8 0

Answer:

100(2.5)+75=$325

Step-by-step explanation:

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family of solutions of the second-order DE y y 0. Find a solution of the second-order IVP consisting of this differential equati
Anna35 [415]

Answer:

y = \frac{1}{2}e^x -\frac{1}{2} e^{2-x}

Step-by-step explanation:

Given

y=c_1e^x +c_2e^{-x

y(1) = 0

y'(1) =e

Required

The solution

Differentiate y=c_1e^x +c_2e^{-x

y' = c_1e^x - c_2e^{-x}

Next, we solve for c1 and c2

y(1) = 0 implies that; x = 1 and y = 0

So, we have:

y=c_1e^x +c_2e^{-x

0 = c_1 * e^1 + c_2 * e^{-1}

0 = c_1 e + \frac{1}{e}c_2 --- (1)

y'(1) =e implies that: x = 1 and y' = e

So, we have:

y' = c_1e^x - c_2e^{-x}

e = c_1 * e^1 - c_2 * e^{-1}

e = c_1 e - \frac{1}{e}c_2 --- (2)

Add (1) and (2)

0 + e = c_1e + c_1e + \frac{1}{e}c_2 - \frac{1}{e}c_2

e = 2c_1e

Divide both sided by e

1 = 2c_1

Divide both sides by 2

c_1 = \frac{1}{2}

Substitute c_1 = \frac{1}{2} in 0 = c_1 e + \frac{1}{e}c_2

0 = \frac{1}{2} e+ \frac{1}{e}c_2

Rewrite as:

\frac{1}{e}c_2 = -\frac{1}{2} e

Multiply both sides by e

c_2 = -\frac{1}{2} e^2

So, we have:

y=c_1e^x +c_2e^{-x

y = \frac{1}{2}e^x -\frac{1}{2} e^2 * e^{-x}

y = \frac{1}{2}e^x -\frac{1}{2} e^{2-x}

6 0
3 years ago
Homer and bart plan to buy one computer for 499.00 strictly for gaming purposes. Games cost 49.99 each. define each variable and
Ipatiy [6.2K]

Answer:

499.00+49.99x the variable is how many games they get

Step-by-step explanation:


3 0
3 years ago
Read 2 more answers
PLEASE HELP! I will mark Brainly :) thanks!
Setler [38]

Answer:

OK so for EQUATION you would put

solve starting furthest away from variable and work closer.

solve using order of operations.

flip inequality when divided or x.

for BOTH you would put

= _<

>

<

_>

sides are equal.

has more then one answer.

then for INEQUALITY you would put

has one answer

sides are not equal

HOPE THIS HELPS



6 0
4 years ago
A snail travels at a rate of 2.58 feet per minute. How gas will he travel in 9 minutes?
alukav5142 [94]
A snail travels at a rate of 2.58 feet PER MINUTE. After 9 minutes, it will travel 2.58 * 9 feet.

2.58 * 9 = 23.22 feet.

The snail travels 23.22 feet in 9 minutes.

You can see that it travels 2.58 feet per minute. In the next minute, it will travel another 2.58 feet. And so on until the 9th minute passes. This is the same as:

2.58 + 2.58 + 2.58 + 2.58 + 2.58 + 2.58 + 2.58 + 2.58 + <span>2.58 = 9 * 2.58 = 23.22</span>
5 0
3 years ago
Read 2 more answers
92.61<br> x 50.49<br> How to do this decimal multiplication
dimaraw [331]
92.61 • 50.49= 4675.8789

answer = 4675.8789


Download the app Cymath then type the question out and you can get the steps to solve I don’t want to confuse you that’s why I am saying do this because there are 19 different steps to do

4 0
4 years ago
Read 2 more answers
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