Answer:
x =-5± 2i sqrt(14)
Step-by-step explanation:
x^2 + 10x= -81
Take the coefficient of x and divide by 2
10/2 = 5
Square it
5^2 =25
add to each side
x^2 + 10x+25 = -81+25
( x+5) ^2 = -56
Take the square root of each side
sqrt(( x+5) ^2) =± sqrt(-56)
x+5 = ± sqrt(-1) sqrt(4*14)
x+5 =± i sqrt(4)sqrt(14)
x+5 =± i 2 sqrt(14)
Subtract 5 from each side
x+5-5 =-5± i 2 sqrt(14)
x =-5± 2i sqrt(14)
Answer: uhh lol fix ya handwriting it'll help in the future
Step-by-step explanation:
2. (-2,-24)
(-1,-10)
(0,0)
(1,6)
(2,8)
3.(-2,8)
(-1,3)
(0,0)
(1,-1)
(2,0)
Answer:
Red
Step-by-step explanation:me need points
Answer:
B
Step-by-step explanation:
The origin means it starts at 0 but because she was given $50 she starts at 50 and increases - this rules out A or C
The fact that she is putting 15 each month means that she will surpass the original $50 in more than 3 months . This means that it is B ( in my opinion)
Answer:
3 hours
Step-by-step explanation:
First we can find how much money you had to pay for keeping the skates for the additional hours:
$7.70-$3.95=$3.75
Now we find how many hours you kept the skates...
$3.75/$1.25 per hour=3 hours