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
katrin2010 [14]
3 years ago
15

Jenna solved the equation 2x^2 +5x - 42 = 0 . She stated that the solutions to the equation were 7/2 and -6. Do you agree with J

enna's solution? Explain why or why not.
Mathematics
2 answers:
mr_godi [17]3 years ago
7 0

Answer:

Yes. Her solution is correct.

Step-by-step explanation:

Let's check if Jenna solution is correct:

To solve the equation 2x^2 +5x - 42 = 0, we can use Bhaskara's formula:

D = b^2 - 4ac = 25 + 4*2*42 = 25+336 = 361

sqrt(D) = 19

x1 = (-5 + 19)/4 = 14/4 = 7/2

x2 = (-5 - 19)/4 = -24/4 = -6

We must agree with Jenna's solution, because the values she found as solution are correct: with we replace these values of x in the equation, we will find 0 = 0, which is correct and proves that these values are the solution of the equation.

vova2212 [387]3 years ago
6 0

Answer:

Jenna's solution is correct

Step-by-step explanation:

A proper lookat the image attached will provide the necessary explanations

You might be interested in
How do I solve for this
Anon25 [30]

Answer: for 90 degrees it will be 1

for 180 degrees it will be \sqrt{2}/2

Step-by-step explanation:

7 0
3 years ago
Find A. Round to the nearest tenth.
Marianna [84]

Answer:

27.8 degrees

Step-by-step explanation:

Wasn't it 'a,' not 'A,' that you wanted?

The ratio a/ 30 is the cosine of the angle 22 degrees, which in turn is 0.927:

                          a

Then 0.927 = -------    which yields a = 30(0.927) = 27.8 degrees

                         30

3 0
2 years ago
The second side of a triangular deck is 4 feet longer than the shortest side. The third side that is 4 feet shorter than twice t
Svetlanka [38]

The second side of a triangular deck is 4 feet longer than the shortest side

(s+4) = the 2nd side

and a third side that is 4 feet shorter than twice the length of the shortest side.

(2s-4) = the 3rd side

If the perimeter of the deck is 48 ​feet, what are the lengths of the three​ sides?

s + (s+4) + (2s-4) = 48

Combine like terms

s + s + 2s + 4 - 4 = 48

4s = 48

s = 48/4

s = 12 ft is the shortest side

I'll let you find the 2nd and 3rd sides, ensure they add up to 48

Hope this helps!

5 0
3 years ago
2. Which of the following is an equation? <br> A. y/9 - 3<br> B. 9 - 2<br> C. y/9 = 3<br> D. 7 + y
andrew11 [14]
An equation is something with a = sign btw and it’s C because it’s the only one with the = sign
7 0
2 years ago
Bethany has 4 baggies with 8 counters in each baggie. Alex has 7 counters
nikklg [1K]

Answer:

alex has 25 counters

Step-by-step explanation:

8x4=32

32-7=25

25 is your answer

6 0
2 years ago
Read 2 more answers
Other questions:
  • I need help Plz Help me thx
    15·1 answer
  • A printer prints 28 photos in 8 minutes. how many photos does it take to print 35 more photos
    11·1 answer
  • Explain how to estimate the quotient using compatible<br>numbers.plz help fast ​
    10·1 answer
  • Help, ASAP!! Solve the equations and show your work! -5/6x = 20 2/3(x - 7) = -2 I'll give you brainliest!!
    7·2 answers
  • Shawna is saving money to buy a new laptop. She starts her savings with $64. Each week, she adds another $17 to her savings. Gra
    9·1 answer
  • Please help this is due soon
    10·1 answer
  • 2. Each of the bracelets that Veronica made has 45 beeds. Shemede 4 bracelets.
    5·2 answers
  • The sum of 4 consecutive integers is 406. find the integers
    12·2 answers
  • Help me ASAP<br><br>thank you​
    15·1 answer
  • Find the quotient of the following: f(x)=2x-5, g(x) 1-x
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!