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3 years ago

Please Help!!! Will give brainliest.

Mathematics

1 answer:

brilliants [131]3 years ago

3 0

Answer:

Ss the correct asnwers is:

(0,20) ; y = (x²/80) + 20

Step-by-step explanation:

Given that:

Shape of the satellite dish = parabola

Focus of the satellite dish = 40ft above the ground

Let the point on ground be (0,0)

Let the point of Focus be (0,40)

Base is at equal distance from the ground and the focus that is the vertex is at (h,k) = (0,20)

Equation of satellite can be obtained as:

(x - h)² = 4a(y - k)

as (h,k) = (0,20) , a=20

(x - 0)² = 4(20)(y - 20)

x² = 80( y - 20)

x² = 80y - 1600

y = (x²/80) + 20

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I need help RATS :) EHEHEHEHEHEHEEHEHEHEHEHEHEHEHEHEHEEHEHHEHEEHEHEH

galina1969 [7]

Answer:

Ok, so the answer is 3.5

Step-by-step explanation:

From what I could see it says walked for 14 around her block 4 times so your answer is 3.5 because if (Let's call her Patricia) Patricia walked around her block 4 times in 14 minutes, we have to find the unit rate, therefore we have to divide 14 by 4 as shown below

$14/4=3.5$

Thus your only viable solution is 3.5

Hope this Helps! Also, I would appreciate it if I could be rewarded with Brainliest, I work hard on these answers and I would enjoy it, you see my goal is to reach Genius status, as to provide many more helpful answers and help many more people. Even so, I hope that I have come of assistance to you!

4 0

3 years ago

Read 2 more answers

A recent survey found that 30% of telephone users have switched completely to cell phone use (i.e. they do not have landlines in

Genrish500 [490]

Answer:

The probability that exactly 30% of these 10 telephone users do not have landlines in their homes is 0.2668.

Step-by-step explanation:

We are given that a recent survey found that 30% of telephone users have switched completely to cell phone use (i.e. they do not have landlines in their homes).

A random sample of 10 of these customers is selected.

The above situation can be represented through binomial distribution;

$P(X = r) = \binom{n}{r}\times p^{r} \times (1-p)^{n-r}; x = 0,1,2,3,......$

where, n = number of trials (samples) taken = 10 customers

r = number of success = 30% of 10 = 3

p = probability of success which in our question is the probability

that telephone users do not have landlines in their homes,

i.e. p = 30%

Let X = Number of telephone users who do not have landlines in their homes

So, X ~ Binom(n = 10, p = 0.30)

Now, the probability that exactly 30% of these 10 telephone users do not have landlines in their homes is given by = P(X = 3)

P(X = 3) = $\binom{10}{3}\times 0.30^{3} \times (1-0.30)^{10-3}$

= $120 \times 0.30^{3} \times 0.70^{7}$

= 0.2668

4 0

4 years ago

Please help Please help please help please help please help please help

Vanyuwa [196]

i actually just searched it up "volume of a sphere with a diameter of 8" and thats what it said

3 0

3 years ago

George and carmen went on a bicycle trip. they took a bus to their starting piont, and then biked the rest. they traveled 275 ki

rodikova [14]

We need to do a system of equations here.

x + y = 275 (if you travel x km by bike and y km by bus, then you travel 275 km as given in the problem)
y = x + 55 (the problem stated that they were bussed (y) the amount they biked plus 55 more km (x + 55))

The second equation is already solved for y. So, we can plug it in to the first equation.

x + (x + 55) = 275
2x + 55 = 275 [combine x terms]
2x = 220 [subtract 55 from both sides]
x = 110 [divide by 2 to isolate x and solve for it]

Now we know that x is 110, the distance they traveled by bike.
And that's what we needed to answer the problem!

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4 years ago

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Delicious77 [7]

D. the angle of their slope is greater than 40 degrees

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4 years ago