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il63 [147K]
3 years ago
12

What is the vertex form of y = x2 + 4x-7?

Mathematics
1 answer:
alexdok [17]3 years ago
3 0

Find the vertex form.

y=(x+2)^2−11

plz mark me as brainliest :)

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A salesman will earn a commission equal to 1/10 of the total amount sold. If he sells a car with a price of $24,000 what is his
riadik2000 [5.3K]

Answer:

The answer would be c

Step-by-step explanation:

3 0
3 years ago
consider a sequence of independent tosses of a biased coin at times k=0,1,2,…,n. On each toss, the probability of Heads is p, an
omeli [17]

Answer:

1. p*(1-p)

2. n*p*(1-p)

3. p*(1-p)

4. 0

5. p^2*(1-p)^2

6. 57/64

Step-by-step explanation:

1. Let Ik denote the reward (possibly 0) given at time k, for k∈{1,2,…,n}. Find E[Ik].

E[Ik]=  p*(1-p)

2. Using the answer to part 1, find E[R].

E[R]=  n*p*(1-p)

The variance calculation is more involved because the random variables I1,I2,…,In are not independent. We begin by computing the following values.

3. If k∈{1,2,…,n}, then

E[I2k]= p*(1-p)  

4. If k∈{1,2,…,n−1}, then

E[IkIk+1]=  0

5. If k≥1, ℓ≥2, and k+ℓ≤n, then

E[IkIk+ℓ]=  p^2*(1-p)^2

6. Using the results above, calculate the numerical value of var(R) assuming that p=3/4, n=10.

var(R)= 57/64

5 0
3 years ago
Simplify (b^4)^3. ❤️ SLAT*_^}
KiRa [710]

Answer:

b^1^2

Step-by-step explanation:

<em>First, multiply by exponent rule.</em>

<em>(x^y)^z=x^y^z</em>

<em>b^4^*^3</em>

<em>Then, multiply by the numbers from left to right.</em>

<em>4*3=12</em>

<em>b^1^2, </em><em>is the correct answer. </em>

6 0
3 years ago
Read 2 more answers
16 POINTS! NO LINKS! SHOW ALL WORK!
alexira [117]

Answer:

d

a

Step-by-step explanation:

f(3)= 3(3)-1

f(3)=9-1=8

f(x+1)= (x+1)^2-3(x+1)+2

=x^2+2x+1-3x-3+2

=x^2-x

8 0
3 years ago
Or a very large set of data the measured mean is found to be 288.6 with a standard deviation of 21.2. assuming the data to be no
SashulF [63]

The 68-95-99.7 rule tells us 68% of the probability is between -1 standard deviation and +1 standard deviation from the mean. So we expect 75% corresponds to slightly more than 1 standard deviation.

Usually the unit normal tables don't report the area between -σ and σ but instead a cumulative probability, the area between -∞ and σ. 75% corresponds to 37.5% in each half so a cumulative probability of 50%+37.5%=87.5%. We look that up in the normal table and get σ=1.15.

So we expect 75% of normally distributed data to fall within μ-1.15σ and μ+1.15σ

That's 288.6 - 1.15(21.2) to 288.6 + 1.15(21.2)

Answer: 264.22 to 312.98


8 0
3 years ago
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