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barxatty [35]
4 years ago
6

Plz answer as soon as possible (Will report nonsense answers)

Mathematics
1 answer:
raketka [301]4 years ago
4 0
The two lines will intersect at the point (7, 7)
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How many solutions does y=-x^2-4x+7 have
Anastaziya [24]

Answer:

x = sqrt(11 - y) - 2 or x = -sqrt(11 - y) - 2

Step-by-step explanation:

Solve for x:

y = -x^2 - 4 x + 7

y = -x^2 - 4 x + 7 is equivalent to -x^2 - 4 x + 7 = y:

-x^2 - 4 x + 7 = y

Multiply both sides by -1:

x^2 + 4 x - 7 = -y

Add 7 to both sides:

x^2 + 4 x = 7 - y

Add 4 to both sides:

x^2 + 4 x + 4 = 11 - y

Write the left hand side as a square:

(x + 2)^2 = 11 - y

Take the square root of both sides:

x + 2 = sqrt(11 - y) or x + 2 = -sqrt(11 - y)

Subtract 2 from both sides:

x = sqrt(11 - y) - 2 or x + 2 = -sqrt(11 - y)

Subtract 2 from both sides:

Answer: x = sqrt(11 - y) - 2 or x = -sqrt(11 - y) - 2

7 0
3 years ago
Which of the following has the smallest value?<br><br> 19%<br> 0.9<br> 1/4
sleet_krkn [62]
0.9 has the smallest value
3 0
3 years ago
Read 2 more answers
24 H in a d?<br> 90 D in a R A?
puteri [66]

Answer:

The answer is minus 7373838474

Step-by-step explanation:

7 0
4 years ago
n an amusement park, the bumper cars are sometimes becoming disabled and in need of repair. The repairman can fix the disabled b
grigory [225]

Answer:

1 hour 20 minutes

Step-by-step explanation:

Time to fix car ( repair time ) = 20 minutes

Breakdown rate ( λ )  = 2 car per hour

<u>first step : determine service the service rate ( μ )</u>

= 60 minutes / 20 minutes

= 3 cars per hour

<u>next : determine the average waiting time for a disabled car </u>

=  1 / (μ - λ)

= 1 / service rate - breakdown rate

= 1 / ( 3 - 2 )

= 1 / 1 =  1 hour

Finally Total time for a disabled car to be fixed

= repair time + average waiting time

= 20 minutes + 60 minutes

= 1 hour 20 minutes

6 0
3 years ago
The sum of three consecutive odd integers is 57 what are the three integers
Paha777 [63]

Answer:

17,19,21

Step-by-step explanation:

hope this helps

\

8 0
4 years ago
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