Using the quadratic formula to solve x2 + 20 = 2x, what are the values of x? 1 plus-or-minus startroot 21 endroot i negative 1 plus-or-minus startroot 19 endroot i 1 plus-or-minus 2 startroot 19 endroot i 1 plus-or-minus startroot 19 endroot i

-1±√19=x

Step-by-step explanation:

For cuadratic formula we can use the following equation

x+(b/2)±√(b²/4-c)=0

The equation to solve x²-2x+20=0

Where a=1

b=-2

c=20

(2/2)±√2²/4-20=-x

-1±√19=x

the answer is B

Step-by-step explanation:

thank me later ;)

domain is all the x values included in the

0 ≤ x ≤ 2

range is all the y values of the graph

-2 ≤ y ≤ 2

***keep in mind that there are different ways to show domain and range

hope this !

~just a girl in love with shawn mendes

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.