Mathematics, 17.10.2019 17:00, aesthetickait

Idont have much time.

frederick headed for lutzen at 3 kph. later he increased his speed to 4 kph. if it was 52 kilometers to lutzen and the total time of travel was 15 hours, how long did he travel at 3 kph?

Answers: 1

Show answers

Answers

answered: jaumonking

Since distance is equal to rate times time:

Let x= the time traveled at 3 km/h

Let y= the time traveled at 4 km/h

We can say that

3x+4y=52

Or that three (kilometers) times the time traveled at 3 kilometers an hour plus 4 (kilometers) times the time traveled at 4 kilometers an hour is equal to 52; the total distance traveled.

Likewise, we can see that:

x+y=15

Because x, the number of hours traveled at 3 km/h added to y, the time traveled at 4 km/h is equal to 15; the total time traveled.

Now, I'll solve by substitution.

x=-y+15

Substitute that into the other equation.

3(-y+15) + 4y = 52

Distribute

-3y + 45 + 4y = 52

Combine like terms

y + 45 = 52

Minus 45 from both sides

y = 7

So Fredrick traveled at 4 km/h for 7 hours.

Now, to find the other value, substitute the value of y into one of the original equations.

x + 7 = 15

Minus 7

x = 8

Time traveled at 4 km/h = 7 hours

Time traveled at 3 km/h = 8 hoursSince distance is equal to rate times time:

Let x= the time traveled at 3 km/h

Let y= the time traveled at 4 km/h

We can say that

3x+4y=52

Or that three (kilometers) times the time traveled at 3 kilometers an hour plus 4 (kilometers) times the time traveled at 4 kilometers an hour is equal to 52; the total distance traveled.

Likewise, we can see that:

x+y=15

Because x, the number of hours traveled at 3 km/h added to y, the time traveled at 4 km/h is equal to 15; the total time traveled.

Now, I'll solve by substitution.

x=-y+15

Substitute that into the other equation.

3(-y+15) + 4y = 52

Distribute

-3y + 45 + 4y = 52

Combine like terms

y + 45 = 52

Minus 45 from both sides

y = 7

So Fredrick traveled at 4 km/h for 7 hours.

Now, to find the other value, substitute the value of y into one of the original equations.

x + 7 = 15

Minus 7

x = 8

Time traveled at 4 km/h = 7 hours

Time traveled at 3 km/h = 8 hours

answered: Guest

step-by-step explanation:

I’m desperate i’m giving all of my points

answered: Guest

you might have to contact customer support. if you have it on your iphone you just got into your settings> subscriptions> cancel

step-by-step explanation:

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 18:30, kevin72937

Three times the sum of a number and seven is negative thirty-six. what is the number?

Answers: 2

continue

Mathematics, 21.06.2019 19:40, kms275

The cross-sectional areas of a right triangular prism and a right cylinder are congruent. the right triangular prism has a height of 6 units, and the right cylinder has a height of 6 units. which conclusion can be made from the given information? the volume of the triangular prism is half the volume of the cylinder. the volume of the triangular prism is twice the volume of the cylinder. the volume of the triangular prism is equal to the volume of the cylinder. the volume of the triangular prism is not equal to the volume of the cylinder.

Answers: 1

continue

Mathematics, 21.06.2019 21:30, Reebear1447

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches. approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *

Answers: 3

continue

Mathematics, 22.06.2019 00:40, ava5939

Astock has a 25% probability of increasing by $10 and a 75% probability of decreasing by $5. what is the stocks expected increase or decrease?

Answers: 1

continue

Do you know the correct answer?

Idont have much time.

frederick headed for lutzen at 3 kph. later he increased his speed...