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4 years ago

Can you help me with these please 30 points

Mathematics

2 answers:

Solnce55 [7]4 years ago

8 0

Answer:

1 c

2 b

3 a

Step-by-step explanation:

1 Density is a physical property that is specific for all elements. Density is a calculation of Mass divided by volume.

2 b i think because the questions ask if it will sink or float

3 because anything that has a volume of 1g or more will sink because water is 1g

garik1379 [7]4 years ago

3 0

Answer: 1. densities

2. i don’t have the passage but i assume it to be A or D

3. it will sink so A

Step-by-step explanation:

the density must be lower than 1 g/cm3 for it to float

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I will Brainliest. Plz anyone don't scam if it so I will report then the users account will be got deleted.

Alex Ar [27]

Answer:

Step-by-step explanation:

i) 1

ii) see attached

iii) as x goes from 0 to 2, y decreases parabolically from 1 to an acme at -3

iv) y = (x - 2)² - 3

v) -3 < t < 1

if t < -3 no intersection occurs between y = t and y = (x - 2)² - 3

if t = -3, y = t intersects the curve at only one point, (2, -3)

if -3 < t < 1 there exist two intersecting points with positive x values

if t = 1 there exist only one positive x value intersection as the other is at (0, 1) and 0 is neither positive nor negative.

if t > 1 there is one positive x value intersection and one negative x value intersection.

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3 years ago

Express each percent as a fraction: 15.17%=

Tpy6a [65]

15.17% is equal to .1517 (just move the decimal to the left twice)

8 0

3 years ago

Suppose that 3 balls are chosen without replacement from an urn consisting of 5 white and 8 red balls. Let Xi equal 1 if the ith

Katarina [22]

Answer:

The joint probability mass function table is provided below.

Step-by-step explanation:

The experiment consist of drawing 3 balls from an urn containing 5 white and 8 red balls.

The random variable Xi is defined as follows:

Xi = 1; if the ith ball is white

Xi = 0; otherwise.

Then X₁ = the 1st ball is white and X₂ = the 2nd ball is white.

The sample space is as follows:

S = {(X₁ = 0, X₂ = 0), (X₁ = 0, X₂ = 1), (X₁ = 1, X₂ = 0), (X₁ = 1, X₂ = 1)}

Compute the probability of each event in the sample space as follows:

$P(X_{1} = 0, X_{2}= 0)=\frac{8}{13} \times\frac{7}{12}=\frac{14}{39}$

$P(X_{1} = 0, X_{2}= 1)=\frac{8}{13} \times\frac{5}{12}=\frac{10}{39}$

$P(X_{1} = 1, X_{2}= 0)=\frac{5}{13} \times\frac{8}{12}=\frac{10}{39}$

$P(X_{1} = 1, X_{2}= 1)=\frac{5}{13} \times\frac{4}{12}=\frac{5}{39}$

The joint probability mass function table is provided below.

4 0

3 years ago

Sasha sells T-shirts. Each day she earns a set amount, plus a commission. Choose the linear function f to determine Sasha's pay.

fenix001 [56]

Answer:

a. The correct option is f(x) = 3x + 65.

b. Sasha earns 146 that day.

Step-by-step explanation:

Note: This question is not complete. The complete question is therefore provided before answering the question. See the attached pdf file for the complete question.

The explanation to the answer is now given as follows:

a. Choose the linear function f to determine Sasha's pay.

Note: See the attached excel file to see the determination of the correct linear function f to determine Sasha's pay.

From the list of linear functions f given in the question, x represents the number of T-shirts Sasha sold in one day.

Therefore, the correct linear function f to determine Sasha's pay can be determined by simply substituting number of T-shirts for x in each of the linear function f to see which one is the same as the table provided in the question.

From the attached excel file, the correct option is f(x) = 3x + 65. This is indicated in bold red color in the attached excel file.

b. If Sasha sells 27 T-shirts in one day how much money does she earn that day?

This can be calculated using f(x) = 3x + 65 which is the correct linear function f determined in part a above and substituting 27 for x as follows:

Sasha’s earning = 3(27) + 65

Sasha’s earning = (3 * 27) + 65

Sasha’s earning = 81 + 65

Sasha’s earning = 146

Therefore, Sasha earns 146 that day.

Download xlsx

xlsx

pdf

5 0

3 years ago

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Opposite angles formed by two intersecting lines are called _______ angles.

ahrayia [7]

Answer: vertical angles

these angles are also congruent

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3 years ago

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