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3 years ago

Solve the equation. If necessary, round your answer to the nearest tenth.

Mathematics

1 answer:

Sergio039 [100]3 years ago

8 0

X^2=121/4
x^2=30.25
x=+/- 5.5
so B

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The sum of three consecutive odd numbers is 51. Find the numbers. Show your work and

Pachacha [2.7K]

15,17,19 are all odd numbers and add to 51

4 0

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

3 0

3 years ago

Someone help me please!!!

dusya [7]

Answer:

Its upside down.

Step-by-step explanation:

8 0

3 years ago

Liz ran 4/5 km on Monday and 56 KM on Tuesday about how much did she run?

Dimas [21]

Answer:

56.8

Step-by-step explanation:

4/5+56 =56.8

very sorry if this is wrong

3 0

2 years ago

Read 2 more answers

What is 3 multiplied by 1 8/11 as a mixed number or fraction

marishachu [46]

Answer:

57/11 or 5 2/11

Step-by-step explanation:

Convert 1 8/11 into an improper fraction: 1 8/11 = 19/11.

Next, multiply this 19/11 by 3, obtaining 57/11.

This mixed numer is an improper fraction.

If you wish to go further, convert 57/11 into a mixed number:

57/11 = 5 2/11

4 0

3 years ago

Read 2 more answers