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olga55 [171]
3 years ago
13

What is x^2+8x-5 in vertex form? Please explain.

Mathematics
2 answers:
faust18 [17]3 years ago
5 0
x^2+8x-5=\\
x^2+2\cdot4\cdot x-5=\\
x^2+2\cdot4\cdot x+4^2-4^2-5=\\
(x+4)^2-16-5=\\
(x+4)^2-21

lina2011 [118]3 years ago
5 0
<span>x^2+8x-5=\\ x^2-8x+16-21=\\ (x-4)^2-21</span>
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Mamont248 [21]

Answer:

12

Step-by-step explanation:

4y - 2x

= 4(7) - 2(8)

= 28 - 16

= 12

4 0
3 years ago
The population of a city increase exponentially at a rate of x% every 5 years
Lerok [7]

Answer:

1.1460277. Put in your decimal place given to you.

This is the percentage rate.

Step-by-step explanation:

f(x)=0=60100

55=120150

60100=a*b^0

120150/60100=60100/60100*b^5

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5 0
3 years ago
Let f(x)=2x2−8 .
MrRa [10]
Move down c units means minus 2 from whole function

f(x) moved down 2 units means f(x)-2
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f(x)-2=2x²-8-2
f(x)-2=2x²-10


g(x)=2x²-10
3 0
3 years ago
Read 2 more answers
a card is drawn at random from a standard 52 card deck has a 1/13 chance of being at 8. What is the probability of the car not b
Free_Kalibri [48]

Answer:

12/13

Step-by-step explanation:

There are 52 cards in the deck

4 are aces

That leaves 52-4  or 48 that are not aces

P(not an aces) = cards that are not aces / total

                        = 48/52

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5 0
2 years ago
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5x(6x+28)=-23 <br><br>Help I don't understand
aksik [14]

Answer:

Solve the equation for  x  by finding  a,  b, and  c  of the quadratic then applying the quadratic formula.


Exact Form:


x  =  −  70  ±  √4210/30


Decimal Form:


x  =  −0.03


Step-by-step explanation:

5x(6x+28)=−23


Step 1: Simplify both sides of the equation.


30x2+140x=−23


Step 2: Subtract -23 from both sides.


30x2+140x−(−23)=−23−(−23)


30x2+140x+23=0


Step 3: Use quadratic formula with a=30, b=140, c=23.


x=−b±√b2−4ac/2a


x=−(140)±√(140)2−4(30)(23)/2(30)


x=−140±√16840/60


x=−7/3+1/30√4210 or x=−7/3+−1/30√4210

3 0
3 years ago
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