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motikmotik
3 years ago
14

The completely factored form of 2d4 + 6d3 − 18d2 − 54d is

Mathematics
1 answer:
lions [1.4K]3 years ago
3 0

Answer:

2d(d + 3)^2(d - 3)

Step-by-step explanation:

2d^4 + 6d^3 - 18d^2 - 54d

= 2d^3(d + 3) - 18d(d + 3)

= (2d^3 - 18d)(d + 3)

= 2d (d^2 - 9)(d + 3)

= 2d(d + 3)^2(d - 3)

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I’m soooo sorry but can y’all plzzz help me just a couple more times!
slava [35]

Answer:

26/35

Step-by-step explanation:

Each fraction is increasing by 1/35. Therefore, 25/35 + 1/35 = 26/35.

6 0
3 years ago
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Michaela is training for a race. She runs 5 miles in 52 minutes. Her goal is to run 6 miles in 1 hour. By how many minutes per m
Leya [2.2K]

Answer:

2 min

Step-by-step explanation:

she runs 5 miles in 52 min

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6 0
3 years ago
US average math SAT scores follow a normal distribution with a mean of 505 and a standard deviation of 112. A sample of 64 enter
Hitman42 [59]

Answer:

The claim that the scores of UT students are less than the US average is wrong

Step-by-step explanation:

Given : Sample size = 64

           Standard deviation = 112

           Mean = 505

           Average score = 477

To Find : Test the claim that the scores of UT students are less than the US average at the 0.05 level of significance.

Solution:

Sample size = 64

n > 30

So we will use z test

H_0:\mu \geq 477\\H_a:\mu < 477

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z=\frac{505-477}{\frac{112}{\sqrt{64}}}

z=2

Refer the z table for p value

p value = 0.9772

α=0.05

p value > α

So, we accept the null hypothesis

Hence The claim that the scores of UT students are less than the US average is wrong

3 0
3 years ago
the odds of rolling a certain number on a single die is 1 chance in 6 rolls. in course of a game, someone rolled 3 fives. accord
Zina [86]

Answer:

18

Step-by-step explanation:

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S / F

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S / (S + F)

So the probability of rolling a 5 is 1/6.  The odds of rolling a 5 is 1/5.

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6 0
3 years ago
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Answer:

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