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
Nikitich [7]
3 years ago
15

Carlos and Maria drove a total of 217 miles in 4.1 hours. Carlos drove the first part of the trip and averaged 52 miles per hour

. Maria drove the remainder of the trip and averaged 54 miles per hour. For approximately how many hours did Maria drive? Round your answer to the nearest tenth if necessary. 2.2 hours 1.1 hours 1.9 hours 1.5 hours
Mathematics
1 answer:
VMariaS [17]3 years ago
4 0
M = hours driven by Maria

c = hours driven by Carlos

since we know that Carlos was driving at an average of 52 mph, then in 1 hour he drove 52 miles, in 2 hours he drove 2*52 miles in "c" hours he drove c*52 miles or 52c.

Maria on the other hand is faster and does 54 mph, in 1 hour she does 1 * 54 miles, and on 2 hours she does 2 * 54 miles and in "m" hours she does m * 54 miles or 54m.

now, we know the total amount of miles they both drove is 217, so whatever "m" and "c" are we know that 54m + 52c = 217.

we also know it took 4.1 for the whole trip, so m + c = 4.1.

\bf \begin{cases}
m+c=4.1\implies \boxed{c}=4.1-m\\
54m+52c=217\\
-------------\\
54m+52\left( \boxed{4.1-m} \right)=217
\end{cases}
\\\\\\
54m-52m+213.2=217\implies 2m=3.8
\\\\\\
m=\cfrac{3.8}{2}\implies m=1.9

so Maria drove for 1.9 hours.

How many hours did Carlos drive for?  well, c = 4.1 - m.
You might be interested in
What is the range of the following data set?
QveST [7]

60,40,35,45,39

Put in order from least to greatest

35, 39, 40, 45, 60


Range = Max - Min

Range = 60 - 35

Range = 25


Answer

D) 25

3 0
2 years ago
HELP HELP HELP HELP HELP HELP!!!!!
sesenic [268]

Answer:

..

Step-by-step explanation:

8 0
3 years ago
Need help with exponential functions quick <br> 33 points!!!
Vilka [71]

Answer:

Since x is an exponent, y = 15 × 8ˣ represents an exponential function.

5 0
3 years ago
Use the absolute value formula to express the distance between 9 and -8
Sonja [21]

Answer:

17

Step-by-step explanation:

| 9- (- 8) | = | 17 | = 17

Basically the absolute value of N1 - N2

3 0
2 years ago
Read 2 more answers
Help me please thank you
Nezavi [6.7K]
Answer is 28 units because it’s 15 over 42 is equal to 10 over “x”, then you cross multiple which you end up with 15x=420 divide 420 from 15 which equals 28.
4 0
3 years ago
Other questions:
  • Convert 14 ft in yd and ft
    12·1 answer
  • Simplify <img src="https://tex.z-dn.net/?f=%5Cfrac%7B8%28x%2B3%29%5E%7B2%7D%7D%7B2%28x%2B3%29%7D" id="TexFormula1" title="\frac{
    5·1 answer
  • In captivity, the average life span of a grizzly bear is 9 years more than that of a tiger. The sum of the two average life span
    8·1 answer
  • Approximately how many more job openings are expected for security guards than pharmacy technicians?
    11·2 answers
  • {x|x less than or equal to -3 } pls help
    10·1 answer
  • Brianna is getting materials for a chemistry experiment. Her teacher gives her a container that has 0.25 liter of a liquid in it
    15·1 answer
  • Solve using substitution. x − 6y = –8 x + 6y = 16 please help imma fail
    13·2 answers
  • If $1000 is put in the bank and each year the account carns 7 % simple interest, then how much
    11·1 answer
  • F(x) = x + 2 and g(x) = x2 – 4<br> What is (fºg)(x)?<br> x² –2<br> x² + 4x<br> x² + 4x-2
    8·1 answer
  • Solve for X and Y please
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!