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4 years ago

7

− 5 6 − 3 2 v+ 15 4 + 3 1 v

1 answer:

Oxana [17]4 years ago

7 0

Answer: 98 - v

Step by step explanation:

-56 + 154 - 32v + 31v

= 98 - v

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Find the vertex form of y=-x^2-10x-21

luda_lava [24]

Answer:

$\large\boxed{y=-(x+5)^2+4}$

Step-by-step explanation:

$\text{The vertex form of an quadratic equation}\\\\f(x)=ax^2+bx+c=a(x-h)^2+k\\\\h=\dfrac{-b}{2a}\\\\k=f(k)=\dfrac{-(b^2-4ac)}{4a}\\=================================$

$\text{We have:}\\\\y=-x^2-10x-21\\\\a=-1,\ b=-10,\ c=-21\\\\h=\dfrac{-(-10)}{2(-1)}=\dfrac{10}{-2}=-5\\\\k=f(-5)=-(-5)^2-10(-5)-21=-25+50-21=4\\\\y=-(x-(-5))^2+4=-(x+5)^2+4$

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3 years ago

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igomit [66]

Answer:

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Step-by-step explanation:

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4 years ago

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Zarrin [17]

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Step-by-step explanation:

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3 years ago

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rosijanka [135]

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Step-by-step explanation:

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3 years ago

Jada walks up to a tank of water that can hold up to 10 gallons. When it is active, a drain empties water from the tank at a con

Arte-miy333 [17]

Answer:

4.5 minutes

Step-by-step explanation:

At time zero the level was 7 gallons and at time 3 min, the level was 5 gallons.

<u>Take two points:</u>

(0, 7) and (3, 5)

<u>Find the rate of change:</u>

m = (5 - 7)/3 = 2/3

This is a 2 gallons per 3 minutes

<u>Tank holds 10 gallons, it was emptied by 3 gallons and it took:</u>

3 : (2/3) = 3* 3/2 = 4.5 minutes

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2 years ago