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
UNO [17]
3 years ago
5

Solve using the quadratic formula.

Mathematics
1 answer:
worty [1.4K]3 years ago
5 0
The quadratic formula is:
x =  \frac{ - b +  -  \sqrt{ {b}^{2}  - 4ac} }{2a}
so...
x =   \frac{ - ( - 1) +  -  \sqrt{( - 1)^{2} - 4(4)( - 7) } }{2(4)}
so simplified from calculator work

x =  \frac{1 +  \sqrt{113} }{8}  \: and \:  \frac{1 -  \sqrt{113} }{8}
You might be interested in
I'm confused on the error and how to do the correct work.​
lukranit [14]
550-500 is not 500 it’s 50
8 0
3 years ago
10. George earns $455 per week. He receives a 20% raise. What is George's new weekly salary?
djverab [1.8K]

Answer:

$546

Step-by-step explanation:

455*.20=91  

91+455+546

8 0
3 years ago
Read 2 more answers
Can someone help me with this task please? !!
viva [34]

Answer:

we need to get your brain thinking in this way. that you begin to understand how to do these things.

airways to say that your brain is not working that way, is not a valid excuse. we need to change that. your brain needs to get used to this way of thinking.

so, please, please, PLEASE go through the explanations below and tell me, where exactly in these explanations you stopped understanding what I was saying. so that I can better explain to you what is happening.

1. (0, -2)

2. 4

3. a geometric sequence. the common ratio is -2.0

4. the third option

5. the fourth option

Step-by-step explanation:

1. as x increases, y decreases. until, suddenly after x=0, this tendency reverses, and with increasing x also y increases. so, this is a turning point.

2. look at the line. it only starts with x>0 (it looks like x is around 1).

"input" is all the values of x the function has a defined result for (y = result values).

so, as there is no line for negative x, we can eliminate the first 2 answers.

x=0 is no valid answer either (as mentioned above, the line only starts well after x=0).

in the answer options the only x value having an y value above or below this x value is x=4.

3. look at the difference between 2 numbers next to each other in the sequence.

2.4 to -4.8

-4.8 to 9.6

and so on.

what do we need to do to get from the left to the right ?

we need to multiply by -2.

so, the relationship between "sequence item n" (an) to "sequence item n-1" (an-1) is a ratio, a multiplication factor :

an/an-1 = -2

4. it is completely simple. a function can be many things. on an x/y coordinate grid it can have gaps, it can have sharp direction changes,...

but there us one thing a function can never have : multiple different y values for one x value.

in the first graph x=2 has two different y values (-1 and -3). so, it is not clear what the result for x=2 would be. and that means, it is not a function.

in the second graph x=4 has two different y values.

in the third graph all is OK.

in the fourth graph x=-2 has two different y values.

so, only the third option is a function.

5. this function calculates the height of the thrown rock after t seconds of flight.

therefore, only the fourth answer makes sense.

4 0
3 years ago
Can someone help me with this question?
vodomira [7]
The Answer is d hope it’s helps lol
3 0
3 years ago
Sarah, a self employed blogger, has adjusted gross earnings of $45,162 this year. Find the amount of social security and Medicar
maksim [4K]

Answer:

Social Security = 5600.09, Medicare = 1309.70

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • Can a radical ever be rational?
    7·2 answers
  • PLEASE HELP <br><br><br><br><br><br> Note: Please explain your answer below in the answer box
    15·1 answer
  • Dare to solve it so easy ☺️​
    9·1 answer
  • A rental car agency charges $12 per day plus $.10 per mile to rent a certain car. Another agency charges $15 per day plus $.08 p
    12·1 answer
  • Simplify square root of 5 open parentheses 8 plus 3 square root of 6 close parentheses.
    9·2 answers
  • What is the solution to the equation? 2/3a -1/6=1/3
    6·1 answer
  • Find the slope of the line that passes through (5,2) and (9,6).
    15·2 answers
  • Katie has 4 grape candies and 3 cherry candies. The ratio of the mumber of grape candies to the total number of candies is what?
    6·2 answers
  • In order to visit the Museum of Mathematics, Ascend requires `2` chaperons for every `5` students. If the school has `210` peopl
    13·1 answer
  • Ecuaciones lineales , El valor de x , x+7 = 2 necesito saber el reasultado de este ejercicio.​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!