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
eimsori [14]
3 years ago
15

Solve x2−5x=8 by completing the square. Round your answers to the nearest hundredth.

Mathematics
1 answer:
Bogdan [553]3 years ago
5 0

Answer:

x = \dfrac{5}{2} \pm {\dfrac{\sqrt{57}}{2}

Step-by-step explanation:

x^2 - 5x = 8

x^2 - 5x + \dfrac{25}{4} = 8 + \dfrac{25}{4}

(x - \dfrac{5}{2})^2 = \dfrac{57}{4}

x - \dfrac{5}{2} = \pm \sqrt{\frac{57}{4}}

x = \dfrac{5}{2} \pm {\dfrac{\sqrt{57}}{2}

You might be interested in
Pentagon with a side of 6 ft
Hunter-Best [27]
I dont know what youre looking for, but these are the answers you get with a side of 6ft,

n=5
a=6ft
r=4.1291457614135 ft
R= 5.1039048501122 ft
A=61.937186421203 ft^2
P=30ft
x=108`
y=72`
8 0
4 years ago
What is the weight of a ring tailed lemur that has a mass of 10 kg? Use w = mg (g = -9.8 m/s^2)
fiasKO [112]

Answer:

None of these

Step-by-step explanation:

Normally, we consider "weight" to be the force due to gravity that an object exerts in the downward direction. It has a positive value equal to the magnitude of "mg". In this instance, it would be ...

... |(10 kg)·(-9.8 N/kg)| = |-98 N| = 98 N

___

However, you're specifically told to use ...

... w = mg

... w = (10 kg)(-9.8 m/s²) = -98 N

This selection is not among those offered.

8 0
3 years ago
Jack is 3 times as old as lacy. 3 years ago the sum of there ages was 14. How old are they now?
Elan Coil [88]

Answer:

lacy = 8 jack= 24

Step-by-step explanation:

let x be lacys age

3x - 3 + x-3 = 14

3x+x -3 = 14 + 3 = 17

4x = 17 +3 = 20

x = 20/4 = 5

lacys age now = 5+3 = 8

jacks age now = 8 * 3 = 24

3 0
3 years ago
Scores on a standard IQ test are normally distributed with a mean of 100 and a standard deviation of 15. To the nearest integer
ollegr [7]

Answer:

25

Step-by-step explanation:

because I go it wrong and the quiz told me the answer was 25. Pog. I am just as confused.

7 0
3 years ago
Find all missing angles
Murljashka [212]
1.)62
2.) 45
3.) ?
Hopefully that helps, I believe 3 is 104?
5 0
3 years ago
Other questions:
  • A consulting company claims that if job seekers attend the company's career development course, their chance of obtaining a job
    13·1 answer
  • In the manufacturing of a chemical adhesive, 9% of all batches have raw materials from two different lots. This occurs when hold
    14·1 answer
  • Express 0.8 in the form of p by q​
    10·1 answer
  • What does n equal in 2n+33
    5·1 answer
  • Please help meeeeeee
    6·1 answer
  • What is the sum of 4.3+4.16
    15·2 answers
  • A store pays 159$ for a garden statue. The store marks up the price by 40%. 1.) what is the amount of mark up ( nearest hundred)
    13·1 answer
  • Which r-value suggests a weak positive correlation? A. r = 0.17454 B. r = −0.17454 C. r = 0.98264 D. r = −0.98264
    10·1 answer
  • If 8x – 7y =
    7·1 answer
  • SOMEONE HELP ME PLEASE
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!