Solve x2+x-1=0 using the quadratic formula.

1 answer:

6 0

Answer:

x = $\frac{-1 ±\sqrt{5} }{2}$

Step-by-step explanation:

Ignore the A that doesn't belong in the answer

You might be interested in

Vsevolod [243]

Answer:

2,344.32 units

Step-by-step explanation:

the area = 8× ½× 16 × 36.63

= 2,344.32 units

5 0

3 years ago

uysha [10]

Answer: Approximately 146 minutes (or if you need the simplified version the answer is 2 hours and 26 minutes). Step-by-step explanation: Step 1. Two classes of 21 students. To calculate that you would multiply 21 by 2. 21*2=42 Step 2. So now we know you need 42 individual pictures. If they each take 3 minutes to take you need to multiply 42 by 3. 42*3=126. So now you know it’ll take 126 minutes to take all the individual pictures. Step 3. Now, there are 2 classes of people and it takes 10 minutes to take each class picture. So do calculate that you need to multiply 10 by 2. 10*2=20. So it’ll take 20 minutes to take both class pictures. Step 4. Now we know it’ll take 126 minutes to take all the individual photos and 20 minutes to take the class photos. Now to calculate the total amount of time it’ll take to take all the photos you need to add 20 to 126. 126+20=146. So, it’ll take 146 minutes to take all the photos. Step 5. (You can skip this step if no simplification is needed in your problem) So, we all know there is 60 minutes in an hour so we’ll divide 146 by 60. 146/60=2.43. So, now we know it’ll take 2.43 hours to take all the photos. 2.43 hours is 2 hours and 26 minutes. I hope this helps!

4 0

3 years ago

marusya05 [52]

Lena had $24 at the beginning
the movie ticket was $6
it's just basic algebra

4 0

3 years ago

Alexeev081 [22]

Answer: B

Step-by-step explanation:

6 0

3 years ago

tia_tia [17]

You have to find a common denominator for both fractions. I chose the denominator to be 10, so the 1/2 will become 5/10, and 1/5 will become 2/10.

Subtract 5/10 from 2/10. You will get -3/10.

Answer: -3/10

You can check your answer by solving 1/2-3/10=1/5 to see if it is true. (It is:)

5 0

3 years ago