3 years ago

2m in verbal expression

Mathematics

1 answer:

Marat540 [252]3 years ago

5 0

Two times the expression of m.

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20+2x=x+56 solve for x

liubo4ka [24]

Answer:

Rearrange the numbers to their like terms.

which is 2x-x=56-20.

x=36.

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2 years ago

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

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3 years ago

Plz help me I really need help

swat32

Answer:

it 2 parts away

Step-by-step explanation:

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A building is 70 feet tall. A blueprint of the building represents that length as 7 inches. What is the scale of the blueprint

matrenka [14]

Answer:

The scale of the blueprint is 10x smaller

Step-by-step explanation:

Divide. 70 divided by 7 is 10

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