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
Semmy [17]
3 years ago
7

Alysha’s average speed when walking home from the market was 5 mph, and it takes her 21 minutes longer than when she drives to t

he market. If she drives along the same route, at an average speed that is 8 times her average walking speed, how many minutes does it take her to drive home from the market?
Mathematics
1 answer:
Delicious77 [7]3 years ago
3 0

9514 1404 393

Answer:

  3 minutes

Step-by-step explanation:

Let x represent Alysha's time to drive home from the market.

Speed and time are inversely proportional to each other (for the same distance), so we have ...

  (walking speed)(walking time) = (driving speed)(driving time)

  5(x +21) = (8·5)(x)

  x +21 = 8x . . . . . . . . . divide by 5

  21 = 7x . . . . . . . . subtract x

  3 = x . . . . . . .divide by 7

It takes Alysha 3 minutes to drive home from the market.

You might be interested in
Which number is larger -3.4 or -3 1/2 (BTW this is a fraction)? How will graphing these numbers on a number line help you determ
valkas [14]

Answer:

-3.4

Step-by-step explanation:

negative numbers are reverse counting on the line graph.

-3 1/2 is -3.5

-3.4 VS. -3.5

since it is reverse, -3.4 is greater

3 0
3 years ago
What is an expression for the distance between the origin and a point P(x,y)
kirza4 [7]

Answer:

d =  \sqrt{ {x}^{2}  +  {y}^{2} }

Step-by-step explanation:

Distance between origin (0, 0) and point (x, y) is given as:

d =  \sqrt{ {(x - 0)}^{2}  +  {(y - 0)}^{2} }  \\  \\ \red{ \bold{ d =  \sqrt{ {x}^{2}  +  {y}^{2} } }}

5 0
2 years ago
Write and solve an equation to answer the question. 14 is what percent of 70?
slamgirl [31]

Answer:

20%

Step-by-step explanation:

An equation is 14=x/100*70 or 14=(x%)*70, either one works

solve for x:

  1. 14=x/100*70
  2. 14/70=x/100 (Divide each side by 70)
  3. 1/5=x/100 (Simplify 14/70)
  4. 100/5=x (Multiply each side by 100 to isolate x)
  5. x=20 (Simplify 100/5)
  6. 20% (Rewrite as a percent)

hope this helps!!

3 0
3 years ago
Please help with this question ​
leonid [27]

We know that \sin(45)=\cos(45) and this is the only point when sin and cos are equal lengths. Because both \sin(45),\cos(45)=\dfrac{\sqrt{2}}{2}

Now if the sin of 30° is a half that would mean that cos of 60° is also a half.

Hope this helps.

<u>r3t40</u>

5 0
3 years ago
What is the value of the expression below when y = 5?
muminat

Answer:

56

Step-by-step explanation:

10y+6

10(5)+6

10*5=50

50+6=56

3 0
3 years ago
Read 2 more answers
Other questions:
  • The dance committee has $75 to spend on centerpieces. They spent $30 on flowers. If each vase costs $3, write an inequality to f
    12·1 answer
  • Shirts are $9 each . You have a coupon that saves you $5 off your purchase . How much will it cost you to buy 6 shirts
    7·2 answers
  • Three sets of a sum of a number and four are added to the sum of seven times the same number and thirteen.
    7·1 answer
  • What is the volume of the sphere? (Use 3.14 for π.) 301.44 in.3 2,712.96 in.3 904.32 in.3 1,521.12 in.3
    7·2 answers
  • What is the circumference of a circle with a radius of 4 inches?<br> Use 3.14 for TT.
    7·1 answer
  • What is an equation of the line that passes through the points (-1, 1) and<br> (-2,-4)?
    15·2 answers
  • PLEAAAAAASE HELP ME!!!!!!!
    11·2 answers
  • How many different numbers between $\dfrac{1}{1000}$ and $1000$ can be written either as a power of $2$ or as a power of $3$, wh
    11·2 answers
  • Please help me with this!!
    13·1 answer
  • Is it a b c or d ? please help i’m doing iready testing
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!