All categories

3 years ago

When is x - y = 4x - 4y

Mathematics

1 answer:

Setler79 [48]3 years ago

3 0

The answer is
When x = 4
Y = 4
Maybe the answer is correct

You might be interested in

A rectangular parking lot must have a perimeter of 440 feet and an area of at least 8000 square feet. Describe the possible leng

tangare [24]

Answer:

The possible parking lengths are 45.96 feet and 174.031 feet

Step-by-step explanation:

Let x be the length of rectangular plot and y be the breadth of rectangular plot

A rectangular parking lot must have a perimeter of 440 feet

Perimeter of rectangular plot =2(l+b)=2(x+y)=440

2(x+y)=440

x+y=220

y=220-x

We are also given that an area of at least 8000 square feet.

So, $xy \leq 8000$

So, $x(220-x) \leq 8000$

$220x-x^2 \leq 8000$

So, $220x-x^2 = 8000\\-x^2+220x-8000=0$

General quadratic equation : $ax^2+bx+c=0$

Formula : $x=\frac{-b \pm \sqrt{b^2-4ac}}{2a}$

$x=\frac{-220 \pm \sqrt{220^2-4(-1)(-8000)}}{2(-1)}\\x=\frac{-220 + \sqrt{220^2-4(-1)(-8000)}}{2(-1)} , \frac{-220 - \sqrt{220^2-4(-1)(-8000)}}{2(-1)}\\x=45.96,174.031$

So, The possible parking lengths are 45.96 feet and 174.031 feet

3 0

3 years ago

8x-18=30 math homework I need help

horsena [70]

Ok i will give you a hint ok look subtract 18-30 then you will get yhe answef for 8× ok try it

7 0

3 years ago

Read 2 more answers

Juan bought a piece of lumberthat is 20 feet long.

Semmy [17]

Answer:mutiply not sure

Step-by-step explanation:

7 0

2 years ago

A bag contains 18 coins consisting of quarters and dimes. The total value of the coins is $2.85. Which system of equations can b

tatuchka [14]

There's nothing here to choose from but it should be something like : q + d = 18; .25q + .10d = 2.85

5 0

3 years ago

Read 2 more answers

Suppose That the length of a certain rectangular is 1 meter more than 5 times it width. The perimeter of rectangular is 98 meter

Snowcat [4.5K]

Let breadth(b) of rectangular be x
Then length(l) = 5x + 1
We have : perimeter(p) =2(l+b)
Or, p = 2 (5x+1+x)
p = 2 (6x+ 1)
p = 12x + 2
Given that p= 98 m
98=12x+2 i.e. x= 8
So breadth b= 8m and length l =5*8+1= 41m

5 0

3 years ago