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
GalinKa [24]
3 years ago
10

Starting at home, Luis traveled uphill to the gift store for 50 minutes at just 6 mph. He then traveled back home along the same

path downhill at a speed of 12 mph.
What is his average speed for the entire trip from home to the gift store and back?
Mathematics
1 answer:
Orlov [11]3 years ago
8 0

Let S = his average speed.

Let D = distance traveled one way

Time = distance / speed

Set up an equation:

d/6 + d/12 = 2d/S

Multiply the equation by 12s:

12s(d/6) + 12s(d/12) = 12s(2d/s)

Simplify to get:

2sd + sd = 24d

Combine like terms:

3sd = 24d

Divide both sides by d:

3s = 24

Divide both sides by 3:

s = 24/3

s = 8

His average speed was 8 mph.

You might be interested in
Contains the point (-1, 2) and is parallel to<br> x – 2y = -3
ivanzaharov [21]

Answer:

see explanation

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Rearrange x - 2y = - 3 into this form

Subtract x from both sides

- 2y = - x - 3 ( divide all terms by - 2 )

y = \frac{1}{2} x + \frac{3}{2} ← in slope- intercept form

with m = \frac{1}{2}

• Parallel lines have equal slopes, thus

y = \frac{1}{2} x + c ← is the partial equation

To find c substitute (- 1, 2) into the partial equation

2 = - \frac{1}{2} + c ⇒ c = 2 + \frac{1}{2} = \frac{5}{2}

y = \frac{1}{2} x + \frac{5}{2} ← in slope- intercept form

Multiply through by 2

2y = x + 5 ( subtract 2y from both sides )

0 = x - 2y + 5 ( subtract 5 from both sides )

- 5 = x - 2y, thus

x - 2y = - 5 ← in standard form

4 0
3 years ago
What are the lowest comon multiples of the following? ( significant figures is not required for these answers)
Alinara [238K]
A) 34
B) 35
C) 36
D)72f
5 0
3 years ago
Solve for B.<br> Ax+By=C<br> What is B equal to?<br> B=C−Ax/y<br> B=C/Axy<br> B=C/Ax −y<br> B=C−Ax−y
AfilCa [17]

Answer:

B = (C-Ax)/y

Step-by-step explanation:

Solve for B.

Ax+By=C

making B the subject of formula '

Ax+By=C

subtract Ax from both sides

By = C-Ax

By = C-Ax

divide both sides by y

B = (C-Ax)/y

4 0
3 years ago
Read 2 more answers
PLEASE ANSWER ASAP WILL MARK BRAINLIEST
katrin2010 [14]

Answer:

48 hats and 104 shirts

Step-by-step explanation:

These are the equations you build from the problem:

h + s = 152

8.50h + 12s = 1656

This is how I solved them:

s= 152-h

8.5h + 12(152-h) = 1656

8.5h + 1824 - 12h = 1656

Solve for h

h= 48

Put this into first equation (h +s = 152) to get s

8 0
2 years ago
Read 2 more answers
How to solve this- <br>(2y-1)^2-4(2y-1) +4<br><br><br>​
Tems11 [23]
Step by Step Solution
More Icon
STEP
1
:
Equation at the end of step 1

(((2y - 1)2) - 4 • (2y - 1)) + 4
STEP
2
:

Trying to factor by splitting the middle term

2.1 Factoring 4y2-12y+9

The first term is, 4y2 its coefficient is 4 .
The middle term is, -12y its coefficient is -12 .
The last term, "the constant", is +9

Step-1 : Multiply the coefficient of the first term by the constant 4 • 9 = 36

Step-2 : Find two factors of 36 whose sum equals the coefficient of the middle term, which is -12 .

-36 + -1 = -37
-18 + -2 = -20
-12 + -3 = -15
-9 + -4 = -13
-6 + -6 = -12 That's it
5 0
2 years ago
Other questions:
  • Savanna had 404040 iris blooms last year. This year, she had 15\%15%15, percent more iris blooms. How many more iris blooms did
    9·1 answer
  • The coordinates of the endpoints of AB are A(- 8, - 2) and B(16, 6) . Point P is on AB. What are the coordinates of point P, suc
    6·2 answers
  • Lea and her father arrived at the scenic overlook 15 minutes before noon and left 12 minutes after noon using am or pm write the
    11·1 answer
  • Anyone knows how to answer any of these 2
    14·1 answer
  • PLEASE HELP!!<br><br> pleas help me with all of these ;-;
    7·1 answer
  • Que dimensiones de superficie mínimas tendría que tener la platea donde se armara el tanque australiano que tiene un diámetro de
    7·1 answer
  • Sam’s parents agreed to pay 25 percent of the cost of a new bike if Sam paid the rest.
    5·2 answers
  • 1) The numbers from 1 to 5 are written on slips of paper and placed in a bucket. What is the
    7·1 answer
  • Is this right? please help me
    6·2 answers
  • 4. You have 36 pairs of running shoes. Let x be the
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!