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eimsori [14]
3 years ago
15

What is f(x) = 7x2 + 42x written in vertex form?

Mathematics
2 answers:
kumpel [21]3 years ago
5 0
Complete the square
factor out linear coefient
f(x)=7(x^2+6x)
take 1/2 of linear coefient and square it and add negative and positive to inside
6/2=3, 3^2=9

f(x)=7(x^2+6x+9-9)
complete squre
f(x)=7((x+3)^2-9)
expand
f(x)=7(x+3)^2-63 is veretx form
vertex is (-3,-63)
stich3 [128]3 years ago
3 0

Answer:

The answer is D

Step-by-step explanation:

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You decide to put $100 in a saving account to save for a $3000 down payment on a new car. if the account has an interest rate of
valkas [14]
Hi there
The formula is
A=p (1+r/k)^kt
A future value 3000
P present value 100
R interest rate 0.02
K compounded monthly 12
T time?
We need to solve for t
T=[log (A/p)÷log (1+r/k)]÷k
T=(log(3,000÷100)÷log(1+0.02÷12))÷12
T=170.202 years

So it's a
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4 0
3 years ago
A leprechaun places a magic penny under a​ girl's pillow. The next night there are 2 magic pennies under her pillow. The followi
Mars2501 [29]

Answer:

36 days

Step-by-step explanation:

Since the pennies need to be kept under the pillow in order to be doubled, we're really looking for the day the girl will wake up with 21 billions pennies under her pillow.

The general formula of that geometric sequence will be: t = 1 + 2^(n-1)

We need to find the value of n when t will be over 21,000,000,000.

So, the equation becomes:

21,000,000,001 = 1 + 2^(n-1)

2^(n-1) = 21,000,000,000

log(2^(n-1)) = log(21,000,000,000)

(n-1) * log(2) = log(21,000,000,000)

n-1 = log(21,000,000,000) / log(2)

n-1 = 34.29

n = 35.29

Since it has to be complete days, and we have to reach over 21 billions, then we round it up to 36.

5 0
3 years ago
What is the answer to this
hodyreva [135]

Answer:

A

Step-by-step explanation:

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6 0
3 years ago
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An oil spill spreads 25 square meters every 1/6 hour. How much area does the oil spill cover after 2 hours
uranmaximum [27]
25 = 1/6
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150 × 2 = 300 (Which is 2 hours)
Answer: 300 square meters
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3 years ago
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Flura [38]

(Option A), -7x + 12

<h2><u>Mark as Brainliest</u></h2>
6 0
3 years ago
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