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4 years ago

Select all expressions that are equivalent to 6x + 1 - (3x - 1).

Mathematics

2 answers:

cupoosta [38]4 years ago

6 0

Answer:

The answer are b, c and d

Step-by-step explanation:

$3 + 1 - 3x - - 1 \\ 3x + 2$

Marizza181 [45]4 years ago

5 0

Answer: B, C, D

Step-by-step explanation:

6x + 1 - (3x -1)

=> 6x + 1 - 3x + 1

=> 3x + 2

So Answers: B, C, D

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MARK AS BRAINLIEST An artist has a block of clay in the shape of a cube. The edges of the cube measure 3 inches. The artist will

Xelga [282]

Answer:

Step-by-step explanation:

The volume of a cube is given as:

Cube volume = length × length × length

Since the edges of the cube measure 3 inches, this means that the length of the cube is 3 inches, therefore:

Cube volume = 3 inches × 3 inches × 3 inches = 27 in³

The pine tree is the shape of a cone with diameter of 1.5 inches and a height (h) of 2 inches. The radius (r) = diameter / 2 = 1.5 inches / 2 = 0.75 inches.

The volume of the cone = πr²(h/3) = π × (0.75)² × (2/3) = 1.178 in³

The number of pine trees that can be made = Volume of cube / Volume of cone = 27 / 1.178 = 22.9

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3 years ago

62.8 in scientific notation

bearhunter [10]

Answer:

6.28 x 10²

Step-by-step explanation:

first number must be greater than or equal to 1 and less than 10

if you move the decimal to the left you need to increase the power of ten by one for each move

if you move the decimal to the rightt you need to decrease the power of ten by one for each move

8 0

3 years ago

A problem on a multiple-choice quiz is answered correctly with probability 0.9 if a student is prepared. An unprepared student g

lions [1.4K]

Answer:

0.08475

Step-by-step explanation:

The question above is a application of conditional probability.

The formula to use is Baye's Theorem for conditional probability.

From the above question we have the following information:

Probability of answering correctly when prepared = 0.9

Probability of not answering correctly when prepared = 1 - 0.9 = 0.1

Probability of choosing the right answer = 1/4 = 0.25

Probability of choosing the wrong answer = 1 - 0.25 = 0.75

Number of students that prepare for the quiz = 75% = 0.75

Therefore number of students that did not prepare for the quiz = 1 - 0.75

= 0.25

Hence,

The probability of not preparing but choosing the correct answer =

P[ not prepared | correct answer ]

Is calculated as :

P[ not prepared | correct answer ] =

(0.25 × 0.25)/(0.25 × 0.25) + (0.25 × 0.9)

= 0.08475

Therefore, the chance that Mr X did not prepare for the quiz but he gives the right answer = 0.08475

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3 years ago

Are the two triangles in the figure Similar? Justify the answer.what is the distance d across the lake?

Delicious77 [7]

Two triangles are Similar if the only difference is size (and possibly the need to turn or flip one around). Therefore would be answer B.

Find the ratio

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The distance would be 480 ft

8 0

1 year ago

Math question please help<br> If you get this right I will mark you as a brainliest

Phoenix [80]

That's an easy parallelogram, parallel to the x axis. Let's label the points

A(-4,-1),B(-2,4),C(4,4),D(2,-1)

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The height is the change in y between the bases, so 4 - -1 = 5.

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The shoelace formula gives us the area of a polygon from 2D coordinates without worrying about the shape:

(-4,-1),(-2,4),(4,4),(2,-1)

(-2,4),(4,4),(2,-1),(-4,-1)

$A = \frac 1 2 | -4(4) - (-1)(-2) + (-2)(4) - 4(4) + 4(-1) - 4(2) + 2(-1) - (-1)(-4) |$

$A = \frac 1 2 |-60| = 30 \quad \checkmark$

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3 years ago