onna172001
13.03.2020 •
Mathematics
If alexandra increases her usual driving speed by 15 km/h, it will take her 2 hours less to make a trip to her gradnparents house. If she decreaseshe rusualy speed by 15 km/h, it will take her 3 h more than usualy to make the trip. How long is the trip?
Solved
Show answers
More tips
- F Food and Cooking How to Make Napoleon Cake: A Step-by-Step Guide...
- H Health and Medicine How to Increase Hemoglobin in the Blood...
- F Food and Cooking How to Make Chebureki: A Delicious Recipe for Russian Street Food...
- S Style and Beauty Ultimate Guide on How to Care for Suede Shoes...
- T Travel and tourism How to Use a Compass: A Beginner s Guide...
- D Dating, Love, Relationships Does a Person s Character Depend on the Color of Their Eyes?...
- F Food and Cooking Is it Really Possible to Cook Tasty Colored Cauliflower?...
- H Health and Medicine Why do our Joints Crack?...
- H Health and Medicine These Food Additives Can Do Significant Harm to Your Health...
- F Food and Cooking How to Choose the Right Olive Oil: A Comprehensive Guide...
Answers on questions: Mathematics
- M Mathematics A ball is thrown from the top row of seats in a stadium. The function h(t) = -16+ + 128t + 50 gives the height, h, in feet, of the ball t seconds after it is thrown....
- M Mathematics I need help pls branniest...
- M Mathematics 3+2what is the answer to 3+2...
- B Biology Why are finches in the Galápagos Islands a good example of speciation? A. Galápagos finches do not have to compete for food. B. It is very easy to train a Galápagos...
- M Medicine If KCL is available for oral replacement as 20 mEq/15 mL but the drug order calls for 10 mEq, you would administer...
- S Social Studies How would you show your understanding of the difference between a career and career field...
- M Mathematics A. changing the 2 to 1/3 b. changing the 3 to a 2 c. changing the 3 to 1/3 d. changing the 2 to a 3...
Ответ:
Therefore,
Distance of the trip is
Step-by-step explanation:
Let "x" be the Speed of the car and,
"y" be the time to cover the trip to her grandparents,
To Find:
How long is the trip = ?
Solution:
We Know that,
According to the First given condition,
According to the Second given condition,
As we know Distance will remain same so we have
Substituting the values we get
So on Substituting we have
..............Equation ( 1)
Again on Substituting we have
...........Equation ( 2)
Subtracting Equation 1 from equation 2 we get
Substitute y = 12 in equation 1 we get
So we have now,
Therefore the Distance of the trip is
Therefore,
Distance of the trip is
Ответ:
Option A
Step-by-step explanation:
Nadeen started with 18 tokens.
Since each game costs 3 tokens, we can see how much she spent using:
To find how many tokens she have left, we can use:
18 - 3x
Option A should be the correct answer!
Hope this helps!