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
Elden [556K]
3 years ago
8

17. Write a quadratic equation to find two consecutive odd natural numbers whose

Mathematics
1 answer:
Molodets [167]3 years ago
8 0

Answer:

7 and 9

Step-by-step explanation:

So we want two consecutive odd numbers whose product is 63.

Let's write an equation.

Let's let n be a random integer: doesn't matter what it is. Therefore, the first integer <em>must</em> be 2n+1.

This is because we're letting n be whatever it wants to be. If we multiply that whatever number by 2, then it <em>will</em> turn even. If we add 1 to an even number, it becomes odd.

Therefore, our first odd number is (2n+1). Our second, then, must be (2n+3).

Multiply them together. They equal 63. Thus:

(2n+1)(2n+3)=63

Expand:

4n^2+6n+2n+3=63

Combine like terms:

4n^2+8n+3=63

Subtract 63 from both sides:

4n^2+8n-60=0

Divide both sides by 4:

n^2+2n-15=0

And now, factor:

(n+5)(n-3)=0

Zero Product Property:

n+5=0\text{ or } x-3=0

Find n:

n=-5\text{ or } n=3

So, we've found n.

Then the first integer is either:

2(-5)+1 \text{ or } 2(3)+1

Evaluate:

-9 \text{ or } 7

However, we want two consecutive odd <em>natural </em>numbers. So, ignore the -9.

Therefore, our first odd integer is 7.

And our second one would be 9.

So, our answer is 7 and 9.

And we're done!

You might be interested in
What is value of x in the equation 6x+7-2x=3+5x-9
topjm [15]

Answer: x = 13

Step-by-step explanation: First, we simplify the equation to get 4x + 7 = 5x - 6. Then, from there, we subtract 7 on both sides to get 4x = 5x - 13. Then we subtract 5x from both sides, which would give us -x = -13. Finally, we can divide both sides by -1 (because remember, x = 1) to get that x = 13. Hope this helps!

5 0
2 years ago
Answer?? what’s is the value of a
max2010maxim [7]

Answer:

13

Step-by-step explanation:

since the inside of a triangle is equal to 180

180-42-73=65

65/5=13 so 13 should be the answer.

6 0
3 years ago
Read 2 more answers
Phong is rolling a number cube and flipping a coin .what is the probability that the cube will land on 4 and the coin will land
Grace [21]
Probabblity that the cube lands on 4 = 1/6
Probablity that the coin lands heads up = 1/2
Probablity of both happening = 1/2 * 1/6 = 1/12
3 0
3 years ago
Part A: Victor is studying for his Finais. He spends 1/3 of an hour studying for History, 2/3 an hour
Elan Coil [88]

Answer:

3 3/4

Step-by-step explanation: all that you have to do is add 1/3 +2/3+11/4 which gives you 3 3/4

4 0
2 years ago
Researchers found a linear relationship between tail-feather length (in mm) and weight (in g) in a random sample of 20 male long
Dafna11 [192]

Answer:

   

Step-by-step explanation:

As far as I know, this question is not correct. I have the searched the internet and found a similar question which makes sense. In the correct question, 95% Confidence Interval is already given calculated from the software and

<em>95% prediction interval is asked (PI) for the weight of one male long tailed finch weighing 20 g.</em>

We have this data given in the correct question found on internet. And they have calculated this data using software:

New Obs = 20

Fit = 92.34

SE Fit = 5.26

95% Confidence Interval = (81.29, 103.38)

95% Prediction Interval = (67.61, 117.06)

Now, Just look at the prediction interval:

Now the formula for Prediction Interval = Point Estimate ± Margin of Error

Upper limit for prediction interval = 117.06

lower limit = 67.61

Formula for point estimate = (Upper + Lower)/2

Point Estimate = (117.06 + 67.61)/2

Point Estimate = 92.34

Formula for margin of error = (Upper - Lower)/2

Margin of Error = (117.06 - 67.61)/2

Margin of Error = 24.72

Formula for Prediction Interval = Point Estimate ± Margin of Error

PI = 92.34 ± 24.72

4 0
3 years ago
Other questions:
  • Which equation shows y=3x−15 in standard form? 5x−15y=−1 5x−15y=1 15x+5y=−1 15x−5y=1
    5·1 answer
  • SURDS
    9·1 answer
  • Drag the expressions into the boxes to correctly complete the table.
    9·1 answer
  • If 15 cans of food are needed for 7 men for 2 days, the number of cans for 4 men for 7 days is
    9·2 answers
  • Which of the following statements demonstrates the associative property of multiplication?
    15·2 answers
  • <img src="https://tex.z-dn.net/?f=%28%20-%208x%7D%5E%7B2%7D%20%20-%205x%20-%206%29%20%2B%20%28%20-%20x%20%7B%20%7D%5E%7B2%7D%20-
    12·1 answer
  • Graph this function:<br> y + 1 = 2(x + 3)<br> Click to select points on the graph.
    14·1 answer
  • Find the quotient.<br><br> −2 1/2 ÷ 3/4
    8·2 answers
  • Which of the following is the same as cos15°
    9·1 answer
  • PLEASE HELP FAST!!! Find the surface area of the composite figure. Round your answer to the nearest tenth if necessary.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!