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
aleksandr82 [10.1K]
2 years ago
13

A boy rides his bike at a speed of 28 miles per hour. How

Mathematics
1 answer:
sergejj [24]2 years ago
6 0

Answer:

About 4 hours.

Step-by-step explanation:

Let's set up a proportion and cross multiply.

\frac{28 miles}{1 hour} = \frac{120 miles}{x}

Cross multiply.

120 = 28x

Divide by 28 on both sides.

= 4.28571428571

Round this to the nearest whole number, which is just 4. The answer is about 4 hours.

You might be interested in
find the magnitude of two forces f1 and f2 such that at right-angle to each other, their resultant is √13N. Also, if the two for
serious [3.7K]
This can be solved a couple of ways. One way is to use the Pythagorean theorem to write equations for the magnitude from the components of the forces. That is what was done in the graph here.

Another way is to use the Law of Cosines, which lets you make direct use of the angle between the vectors.
.. 13 = a^2 +b^2 -2ab*cos(90°)
.. 19 = a^2 +b^2 -2ab*cos(120°)
Subtracting the first equation from the second, we have
.. 6 = -2ab*cos(120°)
.. ab = 6

Substituting this into the first equation, we have
.. 13 = a^2 +(6/a)^2
.. a^4 -13a^2 +36 = 0
.. (a^2 -9)(a^2 -4) = 0
.. a = ±3 or ±2

The magnitudes of the two forces are 2N and 3N, in no particular order.

5 0
3 years ago
You have 10 fewer quarters than dimes and 5 fewer nickels than quarters. the total value of the coins is $4.75. Set up a system
Yanka [14]
So 
x- quarters
y - dimes
z- nickels

The system of equations would be
x+10=y
z+5=x
x+y+z= 4.75
6 0
3 years ago
What is the value of x? Round your answer to the nearest tenth if necessary.
Nastasia [14]
X is equal to 1.2, I think.
6 0
3 years ago
Read 2 more answers
Jennifer makes 45 blueberry muffins using 6 cups of flour. What is the ratio of cups of flour to blueberry muffins?\
likoan [24]

Answer:

6:45

Step-by-step explanation:

7 0
3 years ago
I NEED HALP CAN SOMEONE HELP ME QUICK!
dybincka [34]

Answer:

2 times 3 is 6 to the 2nd power is 36 - 5 to the second power is 25

36-25=11

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • Is 100,60,50 a right triangle
    14·1 answer
  • If any two rows of matrix are equal the determinent of the matrix is
    6·1 answer
  • I give private lessons in Brazil. <br> I can exert this activity in the United States?
    13·1 answer
  • 30 points
    14·1 answer
  • I need an answer asap
    12·1 answer
  • A fair die is tossed once, what is the probability of obtaining neither 5 nor 2?​
    5·1 answer
  • 11. If the diagonal of a rectangle is 40 meters, and the length is 24 meters. What is the
    11·1 answer
  • IF ANYONE HELPS ME WITH THIS I WILL GIVE U BRAINLIEST AND 100 POINTS BTW ITS INTEGRALS FOR CALCULUS
    15·1 answer
  • Find the radius of the circle whose equation is x2 - 10x + y2 - 10y=-1.<br> 1<br> 7<br> 49
    6·1 answer
  • I need help really bad somebody help me
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!