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
levacccp [35]
2 years ago
14

Solve the equation by completing the

Mathematics
1 answer:
Marizza181 [45]2 years ago
5 0

Answer:

s ≈ - 0.5 , s ≈ 8.5

Step-by-step explanation:

s² - 8s - 4 = 0 ( add 4 to both sides )

s² - 8s = 4

To complete the square

add ( half the coefficient of the s- term )² to both sides

s² + 2(- 4)s + 16 = 4 + 16

(s - 4)² = 20 ( take square root of both sides )

s - 4 = ± \sqrt{20} ( add 4 to both sides )

s = 4 ± \sqrt{20}

Then

s = 4 - \sqrt{20} ≈ - 0.5 ( to the nearest tenth ) ← smaller solution

s = 4 + \sqrt{20} ≈ 8.5 ( to the nearest tenth ) ← larger solution

You might be interested in
The coordinates of a point on a coordinate grid are (−1, 5). The point is reflected across the x-axis to obtain a new point. The
Sliva [168]
D (change the sign for y) and A (change the sign for x)
7 0
3 years ago
Read 2 more answers
Solve for x , 2x-11 -9+ x
romanna [79]
2x - 11
-9 + x
equate the equations
2x - 11 = -9 + x
bring like terms to one side
2x - 11 = -9 + x
- x   +11   +11  - x
-11 and +11 cancels out
+x and -x cancels out
2x - x = 11 - 9
x = 2


3 0
3 years ago
Find the missing height of a rectangular prism that has a volume of 137.5 inches with a width of 2.5 and length 10 in
Marianna [84]

Answer:

The answer would be 5.5

Step-by-step explanation:

To prove it, 10 x 2.5 x 5.5 would equal 137.5

3 0
3 years ago
Solve the whole problem i give brainliest please help me.
Anna11 [10]

Answer:

The inequality is 12.5v + 70 ≥ 215

and the amount of visits they can make is 12 visits

Step-by-step explanation:

if you take away (subtract) 70 from both sides, you'll get

12.5v ≥ 145

and when you divide both sides by 12.5, you'll get 11.6, or 12

3 0
3 years ago
Sin^2 a/2 - sin a/2 + 1/4 = 0​
zimovet [89]

Answer:

<u>a = 60° or π/3</u>

Step-by-step explanation:

<u>Given :-</u>

sin² a/2 - sin a/2 + 1/4

<u>To find :-</u>

a

<u>Solving :-</u>

sin² a/2 - sin a/2 + 1/4 = (sin a/2 - 1/2)² = 0

sin a/2 - 1/2 = 0

sin a/2 = 1/2

a/2 = 30°

<u>Solution :-</u>

<u>a = 60° or π/3</u>

3 0
2 years ago
Other questions:
  • (a) find parametric equations for the line that passes through the point (−2, 5) and is parallel to the vector &lt;3, −8&gt;. (e
    9·1 answer
  • Hope someone can help​
    11·1 answer
  • Jamie wants to run 23/4 miles today, he has already run 11/4.how much farther must he run to meet his goal?
    15·2 answers
  • Given A (-3,5) and B (6,7) find AB
    8·1 answer
  • At noodles &amp; company restaurant, the probability that a customer will order a nonalcoholic beverage is .48. Find the probabi
    10·1 answer
  • How would i simiplify 33/128
    8·1 answer
  • Find the geometric mean of 24 and 45​
    7·1 answer
  • A box of chocolates contains milk chocolates and dark chocolates in the ratio 4:3
    13·2 answers
  • The planting medium Mrs. Jaz uses to start his seeds in the early spring is hydrophobic. What does that word mean, and why would
    15·1 answer
  • Please help:<br> Find the class width of this graph
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!