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
Tema [17]
3 years ago
11

1. Suppose xy = 20, where x and y are functions of t. What

Mathematics
1 answer:
Marizza181 [45]3 years ago
6 0

Answer:

(c) 1.6

Step-by-step explanation:

Given, xy = 20 and both x, y are functions of t.

So,

⇒ \frac{d(xy)}{dt} = x\frac{dy}{dt} + y\frac{dx}{dt}

now, when x = 4, y will be 5 as xy = 20.

by subtituting the values in above equation, we get;

⇒ \frac{d(20)}{dt} = 4(-2) + 5\frac{dx}{dt}

⇒ 0 = -8 + 5\frac{dx}{dt}

⇒ \frac{dx}{dt} = \frac{8}{5}

⇒ \frac{dx}{dt} = 1.6

You might be interested in
Joe is making a ramp.Find the length of the ramp if the height is 7meters and the base is 24 meters
Musya8 [376]

Answer:

the length of the ramp is 25 meters

Step-by-step explanation:

Joe is making a ramp. Ramp forms a right angle triangle with the base

So we use Pythagorean theorem to find the length of the ramp

AC^2(hypotenuse) = AB^2 + BC^2

Length of ramp is the hypotenuse = \sqrt{height^2 + base^2}

=\sqrt{7^2 +24^2}

= \sqrt{49 + 576^2}

= \sqrt{625}

= 25

so the length of the ramp is 25 meters

8 0
3 years ago
1) At Joe's Restaurant, one-fourth of the
andrew11 [14]

Answer:

<u>1/20 of the patrons at Joe's restaurant are expected to be male and out of town.</u>

Step-by-step explanation:

1. Let's review all the information provided for solving this question:

Proportion of patrons that are male at Joe's restaurant = 1/4

Proportion of patrons that are from out of town at Joe's restaurant = 1/5

2.  What  proportion would you expect to be  male and out of town?

For finding the proportion of the patrons, that would be male and that would be from out of town, we do this calculation:

Proportion of patrons that are male at Joe's restaurant * Proportion of patrons that are from out of town at Joe's restaurant

<u>1/4 * 1/5 = 1/20 </u>

<u>It means that 1/20 of the patrons at Joe's restaurant are expected to be male and out of town.</u>

8 0
3 years ago
Social studies class is 4 more than two times the length of recess, in minutes.
makvit [3.9K]
Since there are no numbers, i will assume that the length of recess is 1 minute, or x. if social studies is 4 more than 2 times the length of recess, we can use the equation x*2+4 to solve the problem. the end result will be 6 minutes. Social studies is 6 minutes longer than recess
8 0
2 years ago
78 divided by 190 <br><br>steps
Goryan [66]
78 x 100 = 7800 

<span>How many times does 190 go into 780? </span>
<span>≈ 4....190 x 4 = 760 </span>

<span>780 - 760 = 20...bring down the extra 0 to make it 200. </span>

<span>How many times does 190 go into 200? </span>
<span>≈ 1...subtract 190 from 200 to get a remainder of 10 </span>

<span>190 ÷ 7800 ≈ 41</span>

Hope I Helped You!!! :-)

Have A Good Day!!!
5 0
3 years ago
Which equation shows that 30 is 6 times as many as 5?
irina [24]

Answer:

30 divided by 5

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • the grocery store is 3.76 kilometers from ryan house and 1.67 kilometers from abby house how much farther does ryan live from th
    14·1 answer
  • Sixty percent of eighth graders at the new middle school ride a bus to school.If 228 8th graders ride the bus to school,how many
    15·2 answers
  • A class quiz has 5 True/False questions. The correct answers are T, T, F, F, and T, in that order. John answered the questions r
    14·2 answers
  • How many complete pieces of ribbon 7/8cm long can be cut from a roll of ribbin that is 149 cm long
    13·2 answers
  • Select the function that is best modeled by the following table
    14·1 answer
  • Billy is building a frame for his father's Garden in the shape of an isosceles trapezoid. The length of the parallel sides are 1
    8·1 answer
  • I need help on this​
    13·1 answer
  • A large aquarium has 6 more fish than a small aquarium. There are 19 fish in the large aquarium. How many fish are in the small
    7·2 answers
  • Write the equation of a line that goes through points (5,6) and (2, 15).
    11·1 answer
  • Juan is three times as old as Gabe and Gabe is six years older than Catherine. If the sum of their ages is 149, how old is each
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!