indiaseel5940
15.07.2019 •
Mathematics
Two cars leave towns 800 kilometers apart at the same time and travel toward each other. one car's rate is 20 kilometers per hour more than the other's. if they meet in 5 hours, what is the rate of the faster car? do not do any rounding.
Solved
Show answers
More tips
- H Health and Medicine How to Treat Styes: Causes, Symptoms, and Home Remedies...
- C Computers and Internet How to Learn to Type Fast?...
- F Food and Cooking Delight for Gourmets: How to Prepare Liver Pate...
- S Style and Beauty How to braid friendship bracelets?...
- H Health and Medicine Mercury Thermometer Danger: What to do when a thermometer breaks?...
- F Food and Cooking Which Calamari Salad is the Most Delicious?...
- S Society and Politics 10 Tips for Boosting Your Self-Esteem...
- F Food and Cooking The Most Delicious and Simple Fish in Batter Recipe...
- H Health and Medicine What is Autism? Understanding the Basics of This Neurodevelopmental Disorder...
- P Philosophy How to Develop Extrasensory Abilities?...
Answers on questions: Mathematics
- M Mathematics How fo you solve the quadratic equation by factoring 3x^2=5x...
- M Mathematics Plz me, 20 points! what is the area of trapezoid abcd? enter your answer as a decimal or whole number in the box. do not round at any steps. __units² a (-1,5) b (3,2) c (0,-2)...
- M Mathematics Find the area of the semicircle. Round your answer to the nearest hundredth. - 2ft area: about...
- M Mathematics Pam took a total of 8 quizzes over the course of 2 weeks. After attending 5 weeks of school this quarter, how many quizzes will Pam have taken in total? Solve using unit rates....
- M Mathematics A room contains 2 parrots, 2 dogs, 1 cat, and 3 turtles. One animal is chosen at random. What is the probability that the animal chosen is a bird? 30 % 25 % 20% 40%...
- M Mathematics Which two ratios form a proportion? A) 1 : 4 and 5 : 20 B) 1 : 4 and 20 : 5 C) 4 : 1 and 20 : 4 D) 4 : 1 and 4 : 20...
- M Mathematics What is the perimeter of triangle ABC? 9+21 units 9+ 29 units 9+41 units + 61 units...
- M Mathematics The composite figure is made up of two congruent rectangular pyramids joined at their bases. What is the total volume of the composite figure? O 30 units 3 O 60 units 120 units...
- M Mathematics 92 inRadius =Diameter...
- M Mathematics Multiply using one of the rules for the square of a binomial.(6x – 3y)2 =...
Ответ:
distance traveled by faster car = d
distance traveled by slower car = 800 - d
slower speed = v
faster speed = v + 20
t = 5
distance = speed * time
faster car:
d = (v + 20) * 5 > first equation
slower car:
800 - d = v * 5 > second equation
Solve the two equations as a system of equations.
d = -5v + 800
d = 5v + 100
Add the equations:
2d = 900
d = 450
Now substitute d = 450 into equation d = 5v + 100 and solve for v.
450 = 5v + 100
350 = 5v
v = 70
The slower car's speed is 70 km/h.
The faster car's speed is 70 + 20 = 90.
The rate of the faster car is 90 km/h.
Ответ:
When I was thirteen years old, we left our hometown for the last time. I was forced to start high school in a strange place. It was hard, but I learned that being thrown into a new environment can be great.
Explanation:
It eez what it eez