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
photoshop1234 [79]
3 years ago
7

Two cars are traveling down the highway with the same speed. If the first car increases its speed by 1km/hr, and the other car d

ecreases its speed by 10km/hr, then the first car will cover the same distance in 2hrs as the second car in 3hrs. What is the speed of the cars?
Mathematics
1 answer:
Olegator [25]3 years ago
7 0

Answer:

The speed of the cars is 32 \frac{km}{h}

Step-by-step explanation:

First we must first have the clear concept that speed=\frac{distance}{time} or s=\frac{d}{t}

Our question is the speed of the cars then the variable to clear will be s.

Let's raise the equation for each car taking into account that we have the following data:

Car 1: s_{1}=s+1 , t_{1}=2 and d_{1}= d_{2}

Car 1: s_{2}=s-10 , t_{2}=3 and d_{1}= d_{2}

The two cars travel the same distance so we will raise the distance formula for each car and then match them.

<em>Car 1</em>

d_{1}=s_{1}*t_{1}

d_{1}=(s+1)*2

d_{1}=2s+2

<em>Car 2</em>

d_{2}=s_{2}*t_{2}

d_{2}=(s-10)*3

d_{2}=3s.30

d_{1}=d_{2}

2s+2=3s-30

2+30=3s-2s

32=s

The speed of the cars is 32 km/hr

You might be interested in
I will give brainliest to one of the correct answers.
statuscvo [17]

Answer:

1. 7/41

2. 7/15

Step-by-step explanation:

1. Probability that it is a multiple of 6 given that it is a 2 digit number: There are 7 numbers that are a multiple of 6 and are 2 digits: 12, 18, 24, 30, 36, 42, and 48. There are 41 numbers that are 2 digits. So, it is 7/41

2. Probability that it is at least 20 given that it is prime. Out of the prime numbers from 1-50, 7 of them are at least 20 and there are 15 primes in that range in total. So, it is 7/15

3 0
3 years ago
What diretction does the parabola open if its equatin is y=-4(x+2)^2
Fed [463]
It is a cap-size parabola. The parabola "goes down". The graph of this function looks like in this attached picture. 

5 0
2 years ago
You used p minutes one month on your cell phone. The next month you used 75 fewer minutes. Simplify the expression.
Anestetic [448]
Hi there!

Let's assume that one month is represented by the variable 'm', the amount of minutes you started with is 's', and minutes you spent is 'p'.

So, one month can be represented as 'm=s-p'.

The next month is a bit more tricky. This will incorporate 75 less minutes into the equation. 'm=s-75' can be used to represent this, as we assume that you didn't use any minutes in the first month, and that p=75 in this case.

If you found this especially helpful, I'd appreciate if you'd vote me Brainliest for your answer. I want to be able to assist more users one-on-one, as well as to move up in rank! :)
5 0
3 years ago
coppers mother gives him $79 to the store, he buys 15 loaves of bread and 28 cartons of juice each bread is $3 and each juice ca
Leviafan [203]
He doesn't have a positive number. Add $45 and $112 together and it exceeds $79
3 0
2 years ago
Read 2 more answers
Any Quetion in the steps to solve it are shown below 2x-1/4(12x+4)=3
Crazy boy [7]
2x- 3x - 1 =3
-x=4
x=-4
6 0
3 years ago
Other questions:
  • Given function f(x) =3x^2-4 what is f(-2)
    6·1 answer
  • Need Help Please I'm Out Of Time ;(
    15·1 answer
  • Some one help me pls and explain
    15·1 answer
  • Penelope jogs three laps around the playground to keep in shape. The playground is rectangular with width of 163 m and a length
    5·1 answer
  • John has $2 in nickels and dimes in his drawer. The number of nickels is three times the number of dimes. How many of each are i
    8·2 answers
  • Bea is building a 1:120 scale model of a museum building. Her model has a rectangular base that is 3 feet wide and 2 feet long.
    14·1 answer
  • What is the probability of flipping a coin 75 times and getting tails 30 times or fewer? Round your answer to the nearest tenth.
    14·1 answer
  • What is perpendicular to -96/17
    6·1 answer
  • Could someone help what is the variable in “8y3”?
    11·1 answer
  • A pole that is 12 feet tall casts a shadow
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!