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
Ede4ka [16]
2 years ago
13

06. Kristen can run at 15km/hr and walk at 5 km/hr. She completed a 42 km marathon in 4 hours. What distance did Kristen run dur

ing the marathon?
Mathematics
1 answer:
Mrac [35]2 years ago
7 0
Let x be the time she ran and y be the time she walked 

then distance ran =  25x and distance walked = 5y 

so 15x + 5y = 42

and x + y = 4

* second equn. by -5:-

-5x - 5y = -20

add this to the first equn:0

10x = 22
x = 2.2

distance she ran = 2.2 * 15  =  33 km
You might be interested in
What is the solution to a two-variable equation? pls answer
zloy xaker [14]
In general, a solution of a system in two variables is an ordered pair that makes BOTH equations true. In other words, it is where the two graphs intersect, what they have in common. So if an ordered pair is a solution to one equation, but not the other, then it is NOT a solution to the system
8 0
3 years ago
Read 2 more answers
If 6 sandwich rolls cost $1.44, how much will 26 rolls cost?
tresset_1 [31]

$6.24. This is because 1.44 / 6 = 0.24, and 0.24 x 26 = 6.24.

4 0
3 years ago
Read 2 more answers
WILL MARK BRAINLIST!!!!
Lesechka [4]

Answer:

Step-by-step explanation:

I had this answer

8 0
2 years ago
Read 2 more answers
HELP ME PLEASE!!!!!!!!
garri49 [273]

Perimeter is adding all the outside dimensions. The left side of the shoae is a rectangle, so the bottom line is the same as the top line, 10 feet.


Perimeter = 8 + 10 + 8.9 + 10 + 4 = 40.9 ft.


4 0
3 years ago
Which line plot displays a data set with an outlier?<br><br> Plz answer quickly!
iren2701 [21]
The answer is the first data set because remember, an outlier is a number in a data set that is extremely far away from all of the other numbers.

You can easily tell which one is the outlier, the first data set's outlier is 13, because it is was placed so far away from the other data points.

We know that the first data set is correct because all of the other data sets have numbers that are clustered together.

~Hope I helped!~
7 0
3 years ago
Other questions:
  • Find the solution to the system of equations, x + 3y = 7 and 2x + 4y = 8.
    12·2 answers
  • Tricia drove 102 miles on three gallons of gas. How far can she drive on seven gallons of gas?
    9·1 answer
  • Is 1/5 a rational number?? I need help ASAP
    9·2 answers
  • 2X+4=20+5X<br>A)1/2 B)-1/2 C)2 D)-2​
    12·1 answer
  • JK Rowling is autographing some of the new Harry Potter books. A store sells 56 books and she is able to autograph 5/8 of the bo
    12·1 answer
  • In a rectangle, the sides have measurements of 2x + 1 and 3x - 5 units Find an expression for the area of the rectangle, in squa
    15·1 answer
  • You are fitting a new kitchen and measure the following lengths of pipe . Subtract the shortest length from the longest 0.81m; 1
    9·1 answer
  • I WILL MAKE YOUR ANSWER THE BRAINLIST MAKE SURE YOU ARE RIGHT <br><br> FIND THE VOLUME OF THE CONE
    5·1 answer
  • $31,000 at 1% compounded annually for 6 years
    8·1 answer
  • This box plot shows information about the marks scored in a test.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!