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
Arlecino [84]
4 years ago
10

Chris wants to fence three sides of a rectangular exercise yard for his dog. The fourth side of the exercise yard will be a side

of the house. He has
120
feet of fencing available. Find the dimensions that will enclose the maximum area.

The fence parallel to the house is ___
feet, the fence perpendicular to the house is ____
feet and the area of the yard is ____
square feet.
Mathematics
1 answer:
Semmy [17]4 years ago
4 0

Answer:

  • parallel: 60 ft
  • perpendicular: 30 ft
  • area: 1800 ft^2

Step-by-step explanation:

Let x represent the length of fence parallel to the house. Then the length perpendicular is ...

  y = (120 -x)/2

The area of the yard is the product of these dimensions, so is ...

  A = xy = x(120-x)/2

This is the equation of a parabola that opens downward and has zeros at x=0 and x=120. The maximum (vertex) is on the line of symmetry, halfway between these zeros, at x=60.

The fence parallel to the house is 60 feet.

The fence perpendicular to the house is (120-60)/2 = 30 feet.

The area of the yard is (60 ft)(30 ft) = 1800 ft^2.

You might be interested in
Find the cardinal number of the set<br> C = {x|x € N, 30 &lt; x &lt; 56 and x is divisible by 6},
Naddik [55]
<h3>Answer: 4</h3>

=====================================================

Explanation:

We're given the following

C = \{ x | x \in \mathbb{N}, \ 30 < x < 56, \ \text{ x is divisible by 6}\}

which means that we have a set of natural numbers between 30 and 56, excluding both endpoints, and the set of numbers are also multiples of 6.

So looking at the multiples of 6 that are between 30 and 56 leads us to

{30, 36, 42, 48, 54}

but we cross off 30 as we want x to be larger than that, so we get this updated final list

{36, 42, 48, 54}

There are four items in this final list so the cardinality of the set described is 4. The cardinality is just the number of items in a given set.

4 0
4 years ago
HELP PLEASE I DON'T UNDERSTAND
tresset_1 [31]
It states that the ultimate advice is to show how this communicates together
6 0
4 years ago
How many different outcomes are there for tossing a coin 5 times?
Valentin [98]
<h3>Answer:  32</h3>

Each coin has 2 sides. Because there are 5 coins we know that there are 2^5 = 2*2*2*2*2 = 32 different outcomes.

Tossing a single coin 5 times is the same as flipping 5 coins at once.

7 0
4 years ago
Sum of two digit number is9.When we interchange the digits it is found that the resulting new number becomes twice the other num
ruslelena [56]

Answer:

4 and 5

Step-by-step explanation:

Let the numbers be x and y

If their sum is 9, hence;

x + y = 9 ....1

When reversed

10y+x = 2(10x+y)

10y+x = 20x + 2y

10y - 2y = 20x - x

8y = 19x

y = 10x/8 ...2

Substitute equation 2 into 1;

From 1;

x+y = 9

x +(10x/8) = 9

18x/8 = 9

18x = 72

x = 72/18

x = 4

Since x+y =9

y = 9-x

y =9-4

y = 5

Hence the numbers are 4 and 5

8 0
3 years ago
What is the average rate of change of y with respect to x over the interval [-2, 6] for the function y = 5x 2?
PolarNik [594]
The rate of change for the points (x1,y1) and (x2,y2) is (y2-y1)/(x2-x1)
given
y=5x^2 and find the slope between x=-2 and x=6

y=6(-2)^2=6(4)=24
y=6(6)^2=6(36)=216

(-2,24)
(6,216)

slope=(216-24)/(6-(-2))=(192)/(6+2)=192/8=96/8=48/4=24/2=12
the rate of change is 12
3 0
3 years ago
Other questions:
  • What is 7231 divided by 24
    13·2 answers
  • When x=1, then y = ?​
    12·1 answer
  • please help.....................................................................................................................
    6·1 answer
  • The measures of two complementary angles are
    7·2 answers
  • 16 is 80% of what total amount?
    8·2 answers
  • The area of the regular hexagon is 169.74 ft2 what is the perimeter, rounded to the nearest tenth
    14·1 answer
  • Y = 4x + 10 y = 3x + 15​
    8·1 answer
  • Simplify 3x + 5y + 2x – 4y
    10·2 answers
  • Which parent function is represented by the graph
    14·1 answer
  • The equation the quantity of x plus 20 over 2 = 3x represents when two tutoring services with different rate plans charge the sa
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!