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3 years ago

Graph y=x^2+y^2-4x+8y+16

Mathematics

1 answer:

S_A_V [24]3 years ago

5 0

Here is the function graphed. This is what you asked for.

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A soccer field has an area of 7/8 square miles. The length of the field is 2/5 miles. What is the width of the soccer field?

weeeeeb [17]

7/8=2/5x
If you solve this you get 2.1875 or 35/16

5 0

3 years ago

A wholesale dealer offers 8 lamps for a price of p dollars. Which expression represents the price of a single lamp? A. 8p B. p+8

Nostrana [21]

Find the "unit cost." Divide the total price paid by the number of units sold:

$p
------------ = $(p/8) / lamp
8 lamps

The unit cost is p/8 dollars per lamp.

5 0

3 years ago

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FIND THE AREA OF THE RHOMBUS!!!! PLEASE HELP!!!!

sladkih [1.3K]

Answer:

64 in² (Answer B)

Step-by-step explanation:

Note that this rhombus is made up of a large upper triangle and a large lower triangle. Each of these two triangles has base 2(8 in) (or 16 in) and height 4 in.

The area-of-a-triangle formula is

A = (1/2)(base)(height), which here is

A = (1/2)(16 in)(4 in) = 32 in².

Now double that, because we have an upper triangle of area 32 in² and a lower triangle of the same area 32 in². So the total area of the rhombus is 64 in²

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3 years ago

A literature professor decides to give a 10-questiontrue-false quiz to determine who has read an as-signed novel. She wants to c

Darya [45]

Answer:

The teacher should set the score 7 as the lowest passing grade.

Step-by-step explanation:

Let X = number of correct guesses.

All the questions are of true-false format.

The probability of getting a correct answer is, p = 0.50.

The total number of questions is, n = 10.

The random variable X follows a Binomial distribution with parameters n = 10 and p = 0.50.

The probability mass function of X is:

$P(X=x)={10\chose x}0.50^{x}(1-0.50)^{10-x};\ x=0,1,2,3...$

Now the teaches chose the grading scheme such that the probability of passing a student who guesses on every question is less than 0.05.

Then the probability of failing such a students is at least 1 - 0.05 = 0.95.

Compute the probability distribution of X.

Consider the probability distribution attached below.

The value of x for which P (X ≤ x) is at least 0.95 is, x = 7.

So the teacher should set the score 7 as the lowest passing grade.

7 0

3 years ago

Which expression has the same value as the one below?

marta [7]

Answer:

answer is B 38-18

Step-by-step explanation:

38 + (-18)

38-18

5 0

3 years ago

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