HELP PLS Could use some assistance

Answers

Answer 1

Answer:

Answer:C

Step-by-step explanation:

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2. The path of a high diver is given by y = + (2x2 – 9x – 56), where y is the height of the diverabove the water and x is the horizontal distance from the diving board (in feet). How far from theend of the diving board is the diver when he hits the water?
Celine and Arlene shared $400. Celine received $50 more than Arlene. How much money did Arlene receive?
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I need an explanation so I can understand this because am very confused

A living room is two times as long and one and one-half times as wide as a bedroom. The amount ofcarpet needed for the living room is how many times greater than the amount of carpet needed for the
bedroom?
1 1/2
2
3
3 1/2

Answers

Answer:

Step-by-step explanation:

let's call X the length of the bedroom, Y the wide of the bedroom, A the length of the living room and B the wide of the living room

A living room is two times as long as the bedroom, so:

A = 2X

A living room is one and one-half times as wide as a bedroom, so:

B = 1.5Y

The amount of carpet needed for the living room is A*B and the amount of carpet needed by the bedroom is X*Y

So, AB in terms of XY is:

A*B = (2X)*(1.5Y) = 3(X*Y)

It means that the amount of carpet needed for the living room is 3 times greater than the amount of carpet needed for the bedroom.

Suppose a quiz contains 20 true/false questions. You know the correct answer to the first 10 questions. You have no idea of the correct answer to questions 11 through 20 and decide to answer each using the coin toss method. Calculate the probability of obtaining a total quiz score of at least 85%

Answers

Answer:

0.1719

Step-by-step explanation:

Given that:

A quiz contains 20 questions and 10 questions have been answered rightly

We are to determine the probability of getting a total quiz score of 85%

i.e 0.85 (20) = 17

Let's not forget that 10 is correctly answered out of 17. that implies that we only have 7 more questions to make a decision on.

where;

n = 10,

p + q = 1, 0.5 + q = 1

q = 1 - 0.5

q = 0.5

Let X be the random variable that follows the binomial distribution. Then ;

$P(X = x) =(^n_x) p^x q^(n -x)$

where x = 7

$P(X \geq 7) =P(X=7)+P(X=8)+P(X=9)+P(X=10)$

$P(X \geq 7) =(^(10)_7})\ 0.5^7 \ 0.5 ^(10-7) + (^(10)_(8))\ 0.5^8 \ 0.5 ^(10-8)+(^(10)_9})\ 0.5^9 \ 0.5 ^(10-9)+ (^(10)_(10)})\ 0.5^(10) \ 0.5 ^(10-10)$

P(X ≥ 7) = 0.1719

Solve
.................
-m/20=-2

Answers

Answer:

$\boxed{m = 40}$

Step-by-step explanation:

$-(m)/(20)=\ -2$

Step 1: Simplify both sides of the equation.

$(-1)/(20)m = -2$

Step 2: Multiply both sides by 20/(-1).

$((20)/(-1)) * ((-1)/(20m) = ((20)/(-1) ) * (-2)$

Hope this helped you!

In a sample of 41 water specimens taken from a construction site, 23 contained detectable levels of lead. A 95% confidence interval for the proportion of water specimens that contain detectable levels of lead is 0.409

Required:
Construct a confidence interval for the proportion of water specimens that contain detectable levels of lead.

Answers

Answer:

drippy pen iss

Step-by-step explanation:

What is the slope of the line that goes through the points (6, 4) and (8, −2)? A. −6 B. −3 C. − 1 3 D. 3

Answers

Answer:

B -3.

Step-by-step explanation:

The slope = (y2-y1)/(x2-x1)

= (-2-4)/(8-6)

= -6/2

= -3.

Susan started with a certain number of dollars. She then decided on a number of dollars she would save each day. She added the dollars she saved to the amount with which she started. At the end of day 2, Susan had a total of 20 dollars saved. At the end of day 5, she had a total of 32 dollars saved. How many dollars does Susan start with? Show or explain your work.
Write an equation to model the number of dollars Susan has saved, y, after x days.

Answers

Answer:

Susan start with 12 dollars

Equation to model the number of dollars Susan has saved, y, after x days : $4x-y+12=0$

Step-by-step explanation:

Given : She added the dollars she saved to the amount with which she started. At the end of day 2, Susan had a total of 20 dollars saved. At the end of day 5, she had a total of 32 dollars saved.

To Find: How many dollars does Susan start with? Show or explain your work. Write an equation to model the number of dollars Susan has saved, y, after x days.

Solution :

Since At the end of day 2, Susan had a total of 20 dollars saved.

⇒ $(x_(1) ,y_(1))=(2,20)$