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
Mice21 [21]
3 years ago
13

Starting at home, Emily traveled uphill to the hardware store for 60 minutes at just 6 mph. She then traveled back home along th

e same path downhill at a speed of 12 mph. What is her average speed for the entire trip from home to the hardware store and back? (I need the rate version for this. 24 and 6 are not correct)
Mathematics
1 answer:
Bond [772]3 years ago
3 0
 The distance traveled was 6 miles  (6 mph times 1 hour).

The total distance traveled was 12 miles.

The downhill journey lasted   (6 mi) / (12 mph), or 1/2 hr.

Thus, the average speed was 

12 miles         12 mi
------------- = ------------ = 8 mph
(1 1/2 hr)       (3/2) hr
You might be interested in
8-c is at most -15 how do i translate this into a sentence?
emmainna [20.7K]

The largest number that 8c could be is -15

3 0
3 years ago
What does A equal? Plz help, I will mark brainliest ASAP!!!
xz_007 [3.2K]

Answer:

57. i hope this helps

6 0
2 years ago
Read 2 more answers
3y''-6y'+6y=e*x sexcx
Simora [160]
From the homogeneous part of the ODE, we can get two fundamental solutions. The characteristic equation is

3r^2-6r+6=0\iff r^2-2r+2=0

which has roots at r=1\pm i. This admits the two fundamental solutions

y_1=e^x\cos x
y_2=e^x\sin x

The particular solution is easiest to obtain via variation of parameters. We're looking for a solution of the form

y_p=u_1y_1+u_2y_2

where

u_1=-\displaystyle\frac13\int\frac{y_2e^x\sec x}{W(y_1,y_2)}\,\mathrm dx
u_2=\displaystyle\frac13\int\frac{y_1e^x\sec x}{W(y_1,y_2)}\,\mathrm dx

and W(y_1,y_2) is the Wronskian of the fundamental solutions. We have

W(e^x\cos x,e^x\sin x)=\begin{vmatrix}e^x\cos x&e^x\sin x\\e^x(\cos x-\sin x)&e^x(\cos x+\sin x)\end{vmatrix}=e^{2x}

and so

u_1=-\displaystyle\frac13\int\frac{e^{2x}\sin x\sec x}{e^{2x}}\,\mathrm dx=-\int\tan x\,\mathrm dx
u_1=\dfrac13\ln|\cos x|

u_2=\displaystyle\frac13\int\frac{e^{2x}\cos x\sec x}{e^{2x}}\,\mathrm dx=\int\mathrm dx
u_2=\dfrac13x

Therefore the particular solution is

y_p=\dfrac13e^x\cos x\ln|\cos x|+\dfrac13xe^x\sin x

so that the general solution to the ODE is

y=C_1e^x\cos x+C_2e^x\sin x+\dfrac13e^x\cos x\ln|\cos x|+\dfrac13xe^x\sin x
7 0
3 years ago
Recently in the United States, there were about 300,000,000 cell phone users. That same year there were about 5.7x10^9 cell phon
Alla [95]
\frac{users worldwide}{US users}
\frac{5700000000}{300000000}
19
6 0
3 years ago
Read 2 more answers
NEED HELP FAST PLEASE!
ratelena [41]
(0, -3)(2, -2)
slope = (-2 + 3)/(2-0) = 1/2

b = -3
equation
y = 1/2x - 3

answer is A
<span>y = 1/2x - 3</span>
3 0
3 years ago
Read 2 more answers
Other questions:
  • The dimensions of a rectangle box are consecutive integers. If the box has volume of 13,800 cubic centimeters, what are its dime
    11·1 answer
  • 5x-4+2x=3
    12·1 answer
  • Which expression shows 56x+40y−48z written as a product of the greatest common factor and one other factor?
    6·1 answer
  • What would be a reasonable estimate for 31+m=307
    9·2 answers
  • Kenny has 2 red marbles, 3 blue marbles, and 4 black marbles. Which ratio compares a part to the whole?
    15·2 answers
  • A car was sold at $34000. That price was 85℅ of the orginal price. What was the original price?
    14·1 answer
  • Find the new amount given the original amount and the percent of change. $35,000; 7% decrease​
    8·1 answer
  • А.
    7·2 answers
  • Look at the picture and help answer question 7 please​
    14·1 answer
  • Please help me answer this with the correct answer :)
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!