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
Kobotan [32]
3 years ago
14

Hey yall so im taking a test and imm very confused on hwo to find the letter n for the equation

Mathematics
1 answer:
kotegsom [21]3 years ago
8 0

Answer:

n = -7,6

Step-by-step explanation:

n(n+1)+3=45

distributive property: a(b+c) = ab+ac

n²+n+3 = 45

n²+n -42 = 0

factor now

(n+7)(n-6) = 0

n = -7,6

You might be interested in
Leila's company makes solid metal balls for various industrial uses. A customer wants lead balls that have a diameter of 6 in. I
MakcuM [25]

Answer:

9043.2 in^3 of lead

Step-by-step explanation:

the formula is (4/3)(3.14)r^3

so,

(4/3)(3.14)(3^3) * 80

9043.2

5 0
3 years ago
What is the result when 4x2 + 7x − 5 is subtracted from 9x2 − 2x + 3?
Greeley [361]

The answer is -9x

If you want explanation let me know!

I didn't provide one since you said ''What is the result''

5 0
3 years ago
Read 2 more answers
Pretty Pavers company is installing a driveway. Below is a diagram of the driveway they are
prohojiy [21]

Answer:

The most correct option is;

(B) 958.2 ft.²

Step-by-step explanation:

From the question, the dimension of each square = 3 ft.²

Therefore, the length of the sides of the square = √3 ft.

Based on the above dimensions, the dimension of the small semicircle is found by counting the number of square sides ti subtends as follows;

The dimension of the diameter of the small semicircle = 10·√3

Radius of the small semicircle = Diameter/2 = 10·√3/2 = 5·√3

Area of the small semicircle = (π·r²)/2 = (π×(5·√3)²)/2 = 117.81 ft.²

Similarly;

The dimension of the diameter of the large semicircle = 10·√3 + 2 × 6 × √3

∴ The dimension of the diameter of the large semicircle = 22·√3

Radius of the large semicircle = Diameter/2 = 22·√3/2 = 11·√3

Area of the large semicircle = (π·r²)/2 = (π×(11·√3)²)/2 = 570.2 ft.²

Area of rectangle = 11·√3 × 17·√3 = 561

Area, A of large semicircle cutting into the rectangle is found as follows;

A_{(segment \, of \, semicircle)} = \frac{1}{4} \times (\theta - sin\theta) \times r^2

Where:

\theta = 2\times tan^{-1}( \frac{The \, number \, of  \, vertical  \, squrare  \, sides  \ cut  \,  by  \  the  \  large  \,  semicircle}{The \, number \, of  \, horizontal \, squrare  \, sides  \ cut  \,  by  \  the  \  large  \,  semicircle} )

\therefore \theta = 2\times tan^{-1}( \frac{10\cdot \sqrt{3} }{5\cdot \sqrt{3}} ) = 2.214

Hence;

A_{(segment \, of \, semicircle)} = \frac{1}{4} \times (2.214 - sin2.214) \times (11\cdot\sqrt{3} )^2 = 128.3 \, ft^2

Therefore; t

The area covered by the pavers = 561 - 128.3 + 570.2 - 117.81 = 885.19 ft²

Therefor, the most correct option is (B) 958.2 ft.².

4 0
3 years ago
The temperature of a freezer started at 18 degrees Celsius.After cooling for a few hours, the freezer had a temperature of -12 d
bixtya [17]

Answer:

Step-by-step explanation:

Difference = New temperature - original temperature

                  = -12 - (18)

                 = - 30

New temperature is 30° less than the original temperature

4 0
3 years ago
What value of x makes the equation true?<br><br> 16 + (18 + 10) = (x + 18) + 10<br><br> x = ?
choli [55]

Answer:

  See below

Step-by-step explanation:

16 + (18 + 10) = (x + 18) + 10x

16 + 28 = (x + 18) + 10x        Add like terms in the parentheses

44 = (x + 10x) + 18               Use the community property to regroup like

                                            terms

44 = 11x + 18                         Simply

<u>-18 =        -18</u>                         Substract 18 from both side

26  = 11x                               Simply

<u>26</u>  =  <u>11x</u>                              Divide by 11

11        11

2\frac{4}{11} = x                               Reduce                

3 0
2 years ago
Other questions:
  • What is the standard deviation of 111, 132, 186
    10·1 answer
  • A bag containing 15 ounces of mixed nuts contains 40% cashews. Liam adds 45 ounces of mixed nuts containing 60% cashews in the b
    15·1 answer
  • A number y is 3 times greater than a number x. Which equation shows this relationship
    14·1 answer
  • Write 2 mixed numbers between 3 and 4 that have a product between 9 and 12
    11·1 answer
  • After 8 years, ofelia earned $980 in simple interest from a cd into which she initially deposited $7000. what was the annual int
    5·2 answers
  • Ms. Rodriguez broyght 10 oranges for afternoon snak that she needs to share evenly with the 15 players on her daughters soccer t
    9·1 answer
  • Find the product of 2x2(x + 6). 8x3 2x3 + 12x2 3x3 + 12x2 2x2 + x + 6
    6·2 answers
  • What is the slope of the line that passes through the points (4,10) and (1,10)? Write your answer in simplest form.
    11·2 answers
  • 1. The average Third grade student can read 60 words in 5 minutes What is the average reading rate per minute?​
    15·2 answers
  • Triangle \triangle A'B'C'△A
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!