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andrey2020 [161]
3 years ago
7

Calculate the vertex of the quadratic function: y= -4^2 + 8x -9

Mathematics
1 answer:
expeople1 [14]3 years ago
6 0

Answer:

f(x)=8x-25

Step-by-step explanation:

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A couple has a 400 acre farm that they want to leave to their future grandchildren. They decide to give each grandchild 12% of t
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Answer:

48

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5 0
3 years ago
Help please! <br>using quadratic formula <br>round ti nearest hundred ​
Lera25 [3.4K]

Answer:

x = 0.19 or x = -0.76

Step-by-step explanation:

Equation: 7²-4x = 2

reordering the equation,

7x²-4x-2 = 0

Applying,

x = [-b±√(b²-4ac)]/2a..................... Equation 1

From the question,

Given: a = 7, b = -4, c = -2

Substitute these values into equation 1

x = [-4±√(-4²-(2×7×-2)]/(2×7)

x = [-4±√(16+28)]/14

x = (-4±√44)/14

Either

x = (-4+√44)/14

x = (-4+6.63)/14

x = 2.63/14

x = 0.19

or

x = (-4-√44)/14

x = (-4-6.63)/14

x = -10.63/14

x = -0.76

3 0
3 years ago
Temperature at 9:00PM was 15° By 5 AM the temperature had dropped 20° what was the temperature at 5 PM
Arisa [49]
From 9 P.M. to 5 A.M. the temperature dropped 20°, making the rate over 8 hours, -2.5° Per Hour. By 5 A.M., the temperature is -5° since we had to do 15 - 20. From 5 AM to 5 P.M. is 12 hours so -2.5 x 12 = -30 making 30 how much the temperature dropped between 5 A.M. to 5 P.M. Finally, our last equation is -5 - 30 making -35 our answer.
4 0
3 years ago
A roller coaster at a theme park takes fans on an exciting ride. In the first 20 seconds, it carries passengers up a 30-meter hi
zaharov [31]

Answer:15 meters higher

Step-by-step explanation: 30-30+15

7 0
3 years ago
​Найдите высоту стола.
crimeas [40]

I'm not sure but I'm gonna guess that the answer is 50?

4 0
3 years ago
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