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3 years ago

Does anyone know how too do this please I need help

Mathematics

1 answer:

Natasha2012 [34]3 years ago

4 0

Answer:

1: -17

2 : -51

n/3 that is a fraction

2. n*3

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Please help. will give brain list!!!

Ludmilka [50]

Answer:

0.75, or 3/4. same thing.

Step-by-step explanation:

divide both sides by 3 on a calc. easy!!!!

8 0

3 years ago

Read 2 more answers

A school wishes to enclose its rectangular playground using 480 meters of fencing.

Harlamova29_29 [7]

Answer:

Part a) $A(x)=(-x^2+240x)\ m^2$

Part b) The side length x that give the maximum area is 120 meters

Part c) The maximum area is 14,400 square meters

Step-by-step explanation:

The picture of the question in the attached figure

Part a) Find a function that gives the area A(x) of the playground (in square meters) in terms of x

we know that

The perimeter of the rectangular playground is given by

$P=2(L+W)$

we have

$P=480\ m\\L=x\ m$

substitute

$480=2(x+W)$

solve for W

$240=x+W\\W=(240-x)\ m$

<u><em>Find the area of the rectangular playground</em></u>

The area is given by

$A=LW$

we have

$L=x\ m\\W=(240-x)\ m$

substitute

$A=x(240-x)\\A=-x^2+240x$

Convert to function notation

$A(x)=(-x^2+240x)\ m^2$

Part b) What side length x gives the maximum area that the playground can have?

we have

$A(x)=-x^2+240x$

This function represent a vertical parabola open downward (the leading coefficient is negative)

The vertex represent a maximum

The x-coordinate of the vertex represent the length that give the maximum area that the playground can have

Convert the quadratic equation into vertex form

$A(x)=-x^2+240x$

Factor -1

$A(x)=-(x^2-240x)$

Complete the square

$A(x)=-(x^2-240x+120^2)+120^2$

$A(x)=-(x^2-240x+14,400)+14,400$

$A(x)=-(x-120)^2+14,400$

The vertex is the point (120,14,400)

therefore

The side length x that give the maximum area is 120 meters

Part c) What is the maximum area that the playground can have?

we know that

The y-coordinate of the vertex represent the maximum area

The vertex is the point (120,14,400) -----> see part b)

therefore

The maximum area is 14,400 square meters

Verify

$x=120\ m$

$W=(240-120)=120\ m$

The playground is a square

$A=120^2=14,400\ m^2$

8 0

3 years ago

What is the result of converting 20 ounces into pounds

In-s [12.5K]

20 ounces converts to 1.25 pounds.
(Hope this helps you! Feel free to message me if you have any additional questions. :) Have a nice day!)

5 0

3 years ago

Read 2 more answers

Guys please help me with this question

Kruka [31]

Answer:

if it's gonna equal 12 then a and b equals 6

Step-by-step explanation:

a/b

a=6

b=6

6/6

4 0

3 years ago

DOES ANYONE KNOW HOW TO DO THIS????????????????????????

True [87]

Answer:

0.25 per gallon

slope: 0.25

Step-by-step explanation:

the train travels 25 miles per 100 gallons

this simplifies into 0.25 per 1 gallon

slope is y/x

y/x = 25/100 = 0.25

8 0

3 years ago