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
Ad libitum [116K]
2 years ago
13

PLS HELP! solve by completing the square x²+4x=8

Mathematics
1 answer:
masya89 [10]2 years ago
4 0

Step-by-step explanation:

x²+4x=8

rearrange

x² + 4x - 8 = 0

half of 4 is 2

so

x² + 4x + 2² - 2² - 8 = 0

do x² + 4x + 2²

multiplies to give 4 adds to give 4

2+ 2

(x + 2)²

(x + 2)² - 2² - 8

(x + 2)² - 4 - 8

(x + 2)² - 12

(x + 2 + √12) (x + 2 - √12)

√12 = √4 * √3 = 2 √3

(x + 2 + 2√3) (x + 2 - 2√3)

You might be interested in
Sue graphed the formula for converting temperatures from Fahrenheit to Celsius.If the temperature is 50 degrees Fahrenheit, what
kherson [118]

Answer:

10°C

Step-by-step explanation:

The temperature is 50°F

Let's assume that 50°F = x°C

The formula is;

(x°C × \frac{9}{5}) + 32 = 50°F

\frac{9}{5}x°C = 50 - 32 = 18

\frac{9}{5}x°C = 18

x°C = \frac{5}{9} × 18 = 10°C

So 50°F is equal to 10°C.

5 0
3 years ago
Read 2 more answers
What are the factors of the quadratic equation? 6=x2 +5x
disa [49]
X2 + 5x - 6 =0
(x +6)(x-1)=0

4 0
3 years ago
Read 2 more answers
Ellen flipped a coin 80 times. the coin landed heads up 44 times and tails up 36 times. what is the theoretical probability of l
wel

Answer:

36/80 chance of landing on tails, or a 45% chance .

5 0
2 years ago
Christina collected information about the ages of the players on her softball team. The ages were 10, 12, 14, 13, 12, 11, 13, 12
BARSIC [14]

We are told that Christina collected information about the ages of the players on her softball team. The ages were 10, 12, 14, 13, 12, 11, 13, 12, 11, 12, 12, and 13. Christina wants to describe the players’ ages in an article for the school newspaper.

Since we know that range of a data is difference between the highest and lowest values of a data set. Range of our data set will be 4 (14-10). A group of different ages could have same range as Christina's data set. So range will be not a good option.

A measure of central tendencies will be better option to represent information about ages of softball team players. Mean will give the average age of softball players.

\text{Mean age of players}=\frac{10+11+11+12+12+12+12+12+13+13+13+14}{12}

\text{Mean age of players}=\frac{145}{12}=12.0833

Let us find median of data.

10,11,11,12,12,12,12,12,13,13,13,14        

\text{Median age of softball players}=\frac{12+12}{2}

\text{Median age of softball players}=\frac{24}{2}=12

We can see that average of our data is 12 years.    

Therefore, a measure of central tendency will be better choice to describe ages of softball players.      

7 0
3 years ago
Nathan buys 8 bottles of iced tea at the grocery store. He has coupons for $0.35 off the regular price of each bottle. After usi
solniwko [45]

Answer:

$1.25

Step-by-step explanation:

0.35 x 8 = 2.80

7.20 + 2.80 = 10

10 divided by 8 = 1.25

Thank you :)

3 0
2 years ago
Other questions:
  • brian just started using a budget he proudly tells friends that his budget helps him know where his money is being spent it allo
    14·2 answers
  • your distance from lightning varies directly with the time it takesYou to hear thunder. If you hear the thunder 10 seconds after
    8·1 answer
  • Dr. Samuel Hayden invested $750 for three years at an interest rate of 0.035. How much interest did he earn in that time?
    13·1 answer
  • 1.3.PS-44 Question Help A housekeeper had 2 3 of a spray bottle of a cleaning solution. She used 1 4 of the solution in a day. H
    5·1 answer
  • What is a linear function
    8·2 answers
  • What is the solution of the system? 5x + 2y = 9 4x - 3y = 44
    15·1 answer
  • PLZ HELPO!! WILL GIVE BRAINLEST
    7·1 answer
  • Please can you work this out?
    14·1 answer
  • Write the quadratic equation
    6·1 answer
  • a) Students returning to a secondary school have to pass through a check point at the rate of 50 per though. The average time fo
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!