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Kipish [7]
4 years ago
11

Find v(w+3) for v(w)=2w-1

Mathematics
1 answer:
sergey [27]4 years ago
6 0
So we have v(w) = 2w - 1

Now we make the following change: w ---> w +3.
So we change every "w" into a "w+3" as follows:

v(w) = 2w - 1 --------> v(w+3) = 2*(w+3) - 1

Let's solve this.
2*(w+3) - 1
2*w + 2*3 - 1
2w + 6 - 1
2w + 5

So

v(w+3) = 2w + 5
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In order to determine an interval for the mean of a population with unknown standard deviation a sample of 61 items is selected.
Phoenix [80]

Answer:

c. 60

Step-by-step explanation:

Given

n = 61 --- sample

\bar x = 23

Required

Determine the degrees of freedom (df)

This is calculated as:

df = n - 1

df = 61 - 1

df = 60

8 0
3 years ago
What is the percent of decrease from 2,000 to 1,000?
IgorLugansk [536]

Answer:

50%

Step-by-step explanation:

2,000 is 2 x more than 1,000. Or, 1,000 is half of 2,000 and half of 100%=50%.

7 0
4 years ago
3× - 2y = 13, 2x +2y =0​
8090 [49]
Referring to the above 5x=13
Then x=13/5=2.6
For y
2(2.6)+2y=0
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X=2.6
Y= -2.6
3 0
3 years ago
Help me round to the nearest tenth 5x^2-27=6x
Ray Of Light [21]

Answer:

-1.8,3

Step-by-step explanation:

This type of problem often results in two answers for X, and to get it, I often like to rearrange the formula to look like this: 5x^2-6x-27. There are various ways to answer this question, but since this is a quadratic equation, I commend using the quadratic formula! It may look scary, but it is actually really simple. I will attach a picture of this formula for reference when you need it.

looking at our modified formula, a= 5, b=-6, and c= -27. With these values in mind, you can go ahead and plug them in the formula. So it will look like (6±√(-6)²-4(5)(-27) )÷2(5).

Let’s break this down a bit, what this formula is saying is that you’ll have 2 operations to do now, the first one will look like this:

(6+\sqrt{576})/10, this will result in 3, which is one of your values for x

the second operation will be exactly the same, but instead of adding 6 to the square root of 576 (pssst, it is 24 btw), you will be subtracting. This second operation once done will result in -1.8, which is rounded to the nearest tenth!

4 0
4 years ago
Evalúe 3z + 6 when Z=4 <br><br> A) 4<br> B) 6<br> C)8<br> D)18
trapecia [35]

Answer:

D 18

Step-by-step explanation:

3z + 6

Let z=4

3*4 +6

Multiply first

12+6

Then add

18

8 0
3 years ago
Read 2 more answers
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