What Multiplies to 2 and adds up to Negative 2
Answers
x+y=-2
minus x
y=-2-x
sub
x(-2-x)=2
-2x-x^2=2
add 2x+x^2 both sides
0=x^2+2x+2
quadratic formula
if you have
ax^2+bx+c=0
x=
x^2+2x+2
a=1
b=2
c=2
x=
x=
x=
x=
remember √-1=i
x=
x=
x=-1+/-i
x=i-1 or -i-1
the 2 numbers are i-1 and -i-1
Related Questions
Help please I don't understand!!!2. For the system below:a. Solve the system by the linear combination method. Show all work carefully. b. Check your answer.a - 2b = 2a - b = 6
Lila ran at a rate of 4 miles in 30 mintues. There are 1.61 kilometers in 1 mile. What is lilaś running rate in kilometers per hour
Translate the phrase into an algebraic expression. The sum of 9 and w
Is the following correspondence a function? Yes or No?
Answers
Answer:
4x^2 - 3x + 7x - 3
Step-by-step explanation:
Answers
Answer:
Did you find them ?
Step-by-step explanation:
Part B: Write an inequality to represent the amount of money charged per lawn, the cost of the lawnmower and the profit.
Answers
Answer:
I got 65
Step-by-step explanation:
The profit will be given as:
P=$15x−$225
(where we subtracted the cost of the mower) so that P=$750
x will be the required number of needed lawns.
We need to solve:
$750=$15x−$225
rearranging:
x=$750+$225 / $15 =65 lawns
Answers
We are required to calculate the number of days it would take the apprentice working alone
The number of days it takes the apprentice working alone is 6 days
let
Number of days taken for the carpenter to work alone = x
Number of days taken by the apprentice to work alone = 2x
Number of days taken to work together = 2 days
Work done per day Carpenter = 1/x
work done per day apprentice = 1/2x
work done per day together = 1/2
So,
work done per day together = Work done per day Carpenter + work done per day apprentice
1/2 = 1/x + 1/2x
1/2 = (2 + 1) / 2x
1/2 = 3/2x
cross product
1(2x) = 2(3)
2x = 6
x = 6/2
x = 3 days
Therefore,
Number of days taken by the apprentice to work alone = 2x
= 2(3)
= 6 days
Read more:
Answer:
6 days
Step-by-step explanation:
Let the time taken by Carpenter working alone = days
Then time taken by apprentice alone = Twice as that of taken by Carpenter = 2 days
Time taken working together = 2 days
Work done in one day working together =
Work done in one day by Carpenter working alone =
Work done in one day by apprentice working alone =
Work done in one day by Carpenter working alone + Work done in one day by Carpenter working alone = +
= Work done in one day working together =
Time taken by Carpenter alone to complete the work = 3 days
Time taken by Apprentice alone to complete the work = 3 2= 6 days
Answers
Answer:
I will answer here because I am glitching.
Step-by-step explanation:
1. 1.36 < < 2.45
2. 1.65 < < 2.34
3. 1.65 < < 2.34
4. 2.14 < < 3.56
5. 2.41 < < 3.56
I believe this is correct but check if I am wrong.
the card is worth $166.75.
Assuming the pattern continues, write an equation to define A(n), the amount of money on the
rental card after n rentals.
Caitlin rents a movie every Friday night. How many weeks in a row can she afford to rent a movie,
using her rental card only? Explain how you arrived at your answer.
Answers
The equation A(n)= $175 –(n x $2.75) would define the amount of money on the
rental card after (n) rentals.
According to the pattern given, $2.75 will be deducted to the rental card every after Caitlin rents a movie. We can simply divide the amount of the card which is $175 by $2.75 which we presume the rental fee. From that, we can have a result of 63.63 rentals using her card. Therefore, there will be 63.63 weeks Caitlin can afford to rent a movie.