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
Katen [24]
3 years ago
11

Solve the equation

Mathematics
1 answer:
Vikki [24]3 years ago
4 0

Answer:

x ≈ - 5.32, x ≈ 1.32

Step-by-step explanation:

Given

x² + 4x - 7 = 0 ( add 7 to both sides )

x² + 4x = 7

To complete the square

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

x² + 2(2)x + 4 = 7 + 4

(x + 2)² = 11 ( take the square root of both sides )

x + 2 = ± \sqrt{11} ( subtract 2 from both sides )

x = - 2 ± \sqrt{11}

Thus

x = - 2 - \sqrt{11} ≈ - 5.32 ( to 2 dec. places )

x = - 2 + \sqrt{11} ≈ 1.32 ( to 2 dec. places )

You might be interested in
Damon can flip 5 pancakes in 20 seconds,
katen-ka-za [31]

Answer:

24 + 30 = 54 pancakes flipped in 2 minutes :)

Step-by-step explanation:

damon = 5 pancakes in 20 seconds

we do 20 x 3 and 5 x 3 to find how many pancakes he can flip in a minute

15 pancakes and a minute, we then multiply them by 2 to get the amount for 2 minutes

30 pancakes flipped in 2 minutes

Hailey = 2 pancakes in 10 seconds. to make it an equal amount of pancakes per second with damon, i will multiply them by 2 to have 4 pancakes in 20 seconds

we will then do 4 x 3 and 20 x 3 to find out how many pancakes per minute

then we multiply by 2 for 2 minutes

7 0
2 years ago
Read 2 more answers
Please help me with this
Vinvika [58]

Put one point at -10,6 and another at 6,-10

6 0
3 years ago
X^2 -50x+456=0 solve this algebraiclly find x
bagirrra123 [75]

Answer:

x=-406

Step-by-step explanation:

x^2-50x+456=0

x^2-50x=-456

This is because we subtract 456 from each side.

x-50=-456

We then divide the whole equation by <em>x</em> .

x=-406

Adding 50 to both sides gives us <em>x</em> by itself, hope this helps :D

8 0
2 years ago
Read 2 more answers
Robert bough 3/4 pound of grapes and divided them into 6 equal portions.
insens350 [35]

Answer: The answer should be 0.125

Step-by-step explanation:

4 0
2 years ago
Taylor earned $48 for 6 hours of babysitting and $68 for 8.5 hours of babysitting. How long would she have to babysit to earn $3
ZanzabumX [31]
48÷6=$8 per hour
So
32÷8=4 hours
6 0
3 years ago
Other questions:
  • Mustafa, Heloise, and Gia have written more than a combined total of 222222 articles for the school newspaper. Heloise has writt
    9·1 answer
  • The height (in inches) of a person
    13·1 answer
  • If vertex A is at (-1, 2) and vertex B is at (1, 5), then vertex A' is at and vertex B' is at .
    12·1 answer
  • Sean's school raised $32,578. Leslie's school raised $18,749. How much more money did Sean's school raise?
    13·2 answers
  • Divide. −10 ÷ −2
    5·2 answers
  • Bobby bought 3 5/12 ft of red ribbon and 5 1/12 ft of yellow ribbon. ribbon costs $1.20 a foot. How much did Bobby spend on ribb
    15·1 answer
  • GENEROUS DONATIONS WHO EVER ANSWERS FIRST GETS BRAINLIEST!
    14·2 answers
  • Find the unit rate of 3÷12​
    9·2 answers
  • Someone help math please due today
    8·1 answer
  • 4. Ms. Beltran buys songs from a music website. She buys 20 songs for $12.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!