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2 years ago

Which of these expressions is equivalent to 3 (x -2)

Mathematics

2 answers:

DaniilM [7]2 years ago

4 0

Answer:

3 (x -2) = 3x - 6

scoray [572]2 years ago

4 0

Answer:

3x-6

Step-by-step explanation:

(3*x)+(3*-2)

3x-6

Its the same but just multiplied

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The slope of the line below is 2. Which of the following is the the point-slope form of the line?

Jobisdone [24]

Answer: y + 1 = 2 (x -1)

Step-by-step explanation:

Point slope form is:

y - y1 = m (x - x1)

Point on the line is (1, -1) and slope is 2

m = 2

y1 = -1

x1 = 1

y - (-1) = 2 (x - 1) or y + 1 = 2 (x -1)

5 0

3 years ago

Can someone please help me with this (make sure it’s right)

Mekhanik [1.2K]

Step-by-step explanation:

$\tan \angle A = \frac{3}{6} \\ \\ \therefore \: \tan \angle A = 0.5 \\ \\ \therefore \: \angle A = { \tan}^{ - 1} 0.5 \\ \\ \therefore \: \angle A = { \tan}^{ - 1} 0.5 \\ \\ \therefore \: \angle A = { \tan}^{ - 1} tan(26.565051177 \degree) \\ \\ \therefore \: \angle A = 26.57 \degree$

7 0

3 years ago

Read 2 more answers

Help pls! Determine the value of angle a

sergey [27]

Answer:

Step-by-step explanation:

AB=√(5²+8²)=√(25+64)=√89

$cos A=8/\sqrt{89} =(8\sqrt{89} )/89$

7 0

2 years ago

Sophia used the Order of Operations to simplify 4(5 - 2) to 4x3.

Alchen [17]

Answer:

Step-by-step explanation:

<u>Order of operations, use the operation within the parenthesis:</u>

1) 5 - 2 = 3
2) 4*3 = 12

<u>Distributive property, a(b + c) = ab + ac:</u>

1) 4*5 - 4*2 = 20 - 8
2) 20 - 8 = 12

Both ways are correct and lead to same result

5 0

2 years ago

The weight of a package of mints is believed to be normally distributed with mean 21.37 grams and standard deviation 0.4, i.e. X

nasty-shy [4]

Answer:

$P(21$

And using a calculator, excel or the normal standard table we have that:

$P(-1.85$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the weigths of a population, and for this case we know the distribution for X is given by:

$X \sim N(21.37,0.4)$