Mathematics, 30.01.2020 01:55 ag1606

Me with all the questions on both attachments.

Answers: 2

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Answers

Question 1)
We want to know when y hits 0, since that's when it lands.
$0 = -0.04x^{2} + 8.3x + 4.3$

When we factorise, we get x = 208.01679... and -0.51679...
We can disregard the latter, because we know that x > 0, for the horizontal distance. Thus, we get 208.02 metres as our horizontal distance (A)

Question 2)
Using the same method as above, we want to know when the rock hits the ground. Thus, we want to know when y = 0, meaning that it hits the ground.

$-0.05x^{2} + 4.5x - 6.5 = 0$

You can use the quadratric equation to find that x = 88.5316... and 1.4684...
Thus, the answer must be 88.53 metres.

Question 3)
Since we're dealing with a quadratic, there should theoretically be 2 solutions. Let's use the discriminant to check how many solutions there are.

$\delta = b^{2} - 4ac$
$= 2^{2} - 4(5)(-12) 0$

Since the discriminant is greater than zero, there lies two solutions.

Answer from: Quest

1. sometimes

2. never

3 .08c = 7.50+.05c 250 pages

step-by-step explanation:

1. sometimes

the theoretical probability of rolling a 1 is 1/6. perhaps you got really lucky and never rolled a 1 in those 60 times. your experimental probability is 0. or perhaps you rolled a 1 20 times. your experimental probability is 20/60 is 1/3. it really just depends on how you rolled in that experiment.

2. never

the probability of the event occurring is 1. that is being 100 % sure it will happen. that is the maximum amount of confidence we have.

3. no customer card cost: .08 times number of pages

customer card cost: 7.50 + .05 times number of pages

we want to find when it costs the same amount, so we will set these equal

let c = number of pages

.08c = 7.50+.05c

subtract .05c from each side

.08c-.05c = 7.5+.05c-.05c

.03c=7.5

divide each side by .03

.03c/.03 = 7.5/03

c =250

the cost is the same at 250 pages

Answer from: Quest

answer: none of these answers are correct only the second half is

step-by-step explanation:

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Me with all the questions on both attachments.

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