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
frozen [14]
2 years ago
10

Type the correct answer in each box. Use numerals instead of words. Solve the equation by completing the square. x2 + 20x + 82 =

7 The solutions, in order from least to greatest, are x =____ and x = _____.
Mathematics
1 answer:
VikaD [51]2 years ago
5 0
7=x^2+20x+82
0=x^2+20x+75

What adds to 20 and multiplies to 75? 5 and 15.

x^2+5x+15x+75
x(x+5) 15(x+5)
(x+15) (x+5)

Zeroes are x= -5 and x= -15
You might be interested in
Dr. Jimenez found that after applying an antibiotic to bacteria, he observed only 90% of the bacteria left in the culture dish e
USPshnik [31]
<span>If the intial count was 100,000 bacteria, after one hour 90% decrease => 10 % stands => 100,000*0.1 bacetria. After two hours 90% decrease => 10% stands => 100,000*0.1^2. After three hours, they stand 100,000 * 0.1^3. After four hours, 100,000*0.1^4 and after five hours 100,000*0.1^5 = 1 bacteria. Answer: 1 bacteria. If the inital count is different you just have to muliply the inicial count time (0.1^n) to get the number of bacteria after n hours, and if the number of hours is 5, then the factor is (0.1^5). </span>
8 0
3 years ago
Read 2 more answers
Two trains leave Stations 396 miles apart at the same time and travel towards each other. One train travels at 95 mph while othe
PolarNik [594]

It will take 2.2 hours for the trains to meet.

Step-by-step explanation:

Given,

Distance between two trains = 396 miles

Speed of one train = 95 mph

Speed of other train = 85 mph

Combined speed of trains = 95+85 = 180 mph

Distance = Speed * Time

Time = \frac{Distance}{Speed}

Time = \frac{396}{180}

Time = 2.2 hours

It will take 2.2 hours for the trains to meet.

Keywords: speed, distance

Learn more about distance at:

  • brainly.com/question/13219835
  • brainly.com/question/1836777

#LearnwithBrainly

8 0
3 years ago
Dollar is worth three and 3 1/2 kruneros. What is the value of 43 3/4 kruneros?
Korvikt [17]

<em><u>Question:</u></em>

One dollar is worth 3 1/2 kruneros. What is the value of 43 3/4 kruneros?

<em><u>Answer:</u></em>

The value of 43\frac{3}{4} kruneros is 12.5 dollars

<em><u>Solution:</u></em>

Given that,

Dollar is worth three and 3 1/2 kruneros

Which means,

1 \text{ dollar } = 3\frac{1}{2} \text{ kruneros }\\\\1 \text{ dollar } = 3.5 \text{ kruneros }

We have to find the value of 43\frac{3}{4} kruneros

Let us convert the mixed fractions to improper fractions

Multiply the whole number part by the fraction's denominator.

Add that to the numerator.

Then write the result on top of the denominator.

43\frac{3}{4} = \frac{43 \times 4 + 3}{4} = \frac{175}{4} = 43.75

So we have to find the value of 43.75 kruneros

Let "x" be the value of 43.75 kruneros

Then,

1 dollar = 3.5 kruneros

x dollar = 43.75 kruneros

This forms a proportion and we can solve the sum by cross multiply

1 \times 43.75 = x \times 3.5\\\\x = \frac{43.75}{3.5}\\\\x = 12.5

Thus value of 43\frac{3}{4} kruneros is 12.5 dollars

5 0
2 years ago
HELP WILL BE MUCH APRECCIATED
Elan Coil [88]

Answer:

The answer is

f(x) =  {x}^{2}  + 6x + 8

6 0
3 years ago
Read 2 more answers
What is the value of x?
sergij07 [2.7K]
X is 59 because 3x+3=180 and you just have to solve this which would be 59
7 0
2 years ago
Other questions:
  • Find the accumulated value of an investment $10,000 for 3 years at an interest of 7% if the money is compounded semiannually; co
    15·1 answer
  • Jasica Parker would like to have ​$46,000 to buy a new car in 6 years. To accumulate $ 46,000 in 6 ​years, how much should she i
    11·1 answer
  • The simplest form of sqrt 80 can be written as a sqrt b where a = and b =
    7·2 answers
  • A boat costs $19,200 and decreases in value by 12% per year. How much will the
    14·1 answer
  • Pleasee help ill give brainliest
    6·2 answers
  • Solve for X please help I need this asap
    8·2 answers
  • A jewelry store offers its own brand of customizable charm bracelets. You are able to choose from 9
    12·1 answer
  • Which of the fractions below are less than 2/5? Select two.
    7·1 answer
  • What is the solution to the pair of equations? <br> y = 7x − 9<br> y = 3x − 1
    6·2 answers
  • The linear function that is represented by which table has the same slope as the graph? (the tables are the choices)
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!