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Ivanshal [37]
3 years ago
8

F(x)=x^(2)+6x-78 completing the square fill in the blanks: f(x)=(x+blank)^2+blank

Mathematics
1 answer:
krek1111 [17]3 years ago
8 0
The blank: f(x) = (x+3)^2-78+9
You can combine the negative 78 and 9 if you want to, but that should be the next step for that problem.
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the hypotenuse of a 45-45-90 triangle has a length of 10 units. what is the length of one of its legs?
SIZIF [17.4K]
When a triangle is a 45-45-90 triangle, the following rules apply:

-the 2 legs are equal lengths
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- the length of the leg is: hypotenuse divided by the square root of 2.

if the hypotenuse is 10, then 10 divided by the square root of 2 is how you find the leg.
the square root of 2 is <span>1.41421356237. 
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6 0
3 years ago
An arrow is shot vertically upward at a rate of 230 feet per second. Use the projectile formula h = −16t2 + v0t to determine at
maxonik [38]

Answer:

The question gives you V0 as 220, so plug that in first.

h=-16t2+220t.

Then it says to find the time (solve for t), when the height is 400 ft. Plug 500 ft in as h and solve for t.

500=-16t2+220t.

To solve this, set the quadratic equal to 0 by subtracting 500 from both sides (0=-16t2+220t-500) and use the quadratic formula!

Step-by-step explanation:

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1 year ago
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