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
lubasha [3.4K]
3 years ago
11

what value in place of the question mark makes the polynomial below a perfect square trinomial? 9x2+?x+49

Mathematics
2 answers:
Alchen [17]3 years ago
3 0

the missing number should be the square root of the last number times 2 for a perfect trinomial

 so square root of 49 = 7

7*2 =14

 so the missing number should be 14

 

swat323 years ago
3 0
U take the sqrt of the first term, which happens to be 3x...then u take the square root of the 3rd term, which is 7, then u multiply that product by 2....
3x * 7 = 21x.....21x * 2 = 42x

lets check..
9x^2 + 42x + 49 = (3x + 7)^2...correct

so ur middle term will be 42x
You might be interested in
Ellen Saver went to her bank. She had a balance of $2,447.67 in her savings account. She withdrew $231.49 and the teller credite
tester [92]
$2,447.67 - $231.49  = <span>$2,216.18

</span>$2,216.18 + $36.61 = $2,252.79

her new balance is $2,252.79
4 0
2 years ago
Read 2 more answers
A rectangular park has an area of 250 square feet. The length of the park is 7 feet more then twice the width, w of the park. Wh
Andru [333]


Area = length * width

width = w

length = 2w+7

A = (2w+7) * w

250 =2w^2+7w

0 = 2w^2 +7w-250

5 0
3 years ago
Read 2 more answers
9 x n -20 = 16 what is n?
Nostrana [21]
9 × n - 20 = 16
9n - 20 = 16
+ 20
9n = 36
÷ 9
n = 4
Hope this helps! :)

3 0
3 years ago
Trevor spent $27 and now has no money left. What did he have before his purchase
Sav [38]

Answer:$27

Step-by-step explanation:

x-27=0

0+27=27

27-27=0

8 0
2 years ago
Angle ABC has point E on ray BA and point D on ray BC. Points E and D are equidistant from point B. To copy angle ABC, which of
arsen [322]

The identified for the construction is the endpoint of rays BA and BC option (C) is correct.

<h3>What is an angle?</h3>

When two lines or rays converge at the same point, the measurement between them is called a "Angle."

It is given that:

Angle ABC has point E on ray BA and point D on ray BC.

Points E and D are equidistant from point B.

The ED distance because if the distance between E and D is even slightly different, the entire angle ABC will vary.

Thus, the identified for the construction is the endpoint of rays BA and BC option (C) is correct.

Learn more about the angle here:

brainly.com/question/7116550

#SPJ1

3 0
1 year ago
Other questions:
  • 1. What is the slope of the line that passes through the points (-2, 5) and (1, 4)?
    15·1 answer
  • The mathematical expression 2 e V means.
    11·1 answer
  • Please help!! Due tomorrow 7th grade pre- algebra!! <br><br> 50 points pleaseeeee helppp
    5·1 answer
  • Emma and Nathan went to a party supply store to buy decorations for the spring dance. Emma bought 3
    10·1 answer
  • Which statements are true of functions? Check all that apply.
    5·2 answers
  • 21) A frozen yogurt store sells a small bowl of frozen yogurt for $2.50 plus $0.75 per topping. They sell a large bowl of frozen
    6·1 answer
  • Need help on this please
    15·1 answer
  • Α<br> 34°<br> Help me ASAP Thxx
    14·1 answer
  • I am making quilts out of my grandma's square handkerchief collection. I have
    10·1 answer
  • Can anyone help please? Will give Brainly + 25 pts
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!