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SVEN [57.7K]
4 years ago
13

Create an expression equivalent to 3(4x -2) -5x + 10 using the least number of terms.

Mathematics
1 answer:
Fudgin [204]4 years ago
7 0

Answer: 7x+4

Step-by-step explanation:

12x−6−5x+10

(12x−5x)+(−6+10)

7x+4

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Based on daily measurements, Bob's weight has a mean of 200 pounds with a standard deviation of 16 pounds, while Mary's weight h
soldi70 [24.7K]

Answer:

(C) They are the same

Step-by-step explanation:

The coefficient of variation CV is given by the following formula:

CV = \frac{\sigma}{\mu}

In which \sigma is the standard deviation and \mu is the mean.

Bob's weight has a mean of 200 pounds with a standard deviation of 16 pounds

This means that \sigma = 16, \mu = 200.

So his coefficient of variation is

CV = \frac{16}{200} = 0.08

Mary's weight has a mean of 125 pounds with a standard deviation of 10 pounds.

This means that \sigma = 10, \mu = 125

So her coefficient of variation is

CV = \frac{10}{125} = 0.08

They have the same coefficient of variation, so the correct answer is.

(C) They are the same

6 0
3 years ago
jenny`s mom says she has an hour before it's bedtime. Jenny's spends 3\5 of hour texting a friend and 3\8 of the remaining time
laiz [17]
First you'll need to get the same denominator. So instead of 3/5 and 3/8 you'll have 24/40 and 15/40. Now that we've changed the value of the denominator, the 40/40 will now represents the 1 hour that Jenny has before bedtime. So you add 24/40 and 15/40 and get 39/40. 39/40 stands for the time that Jenny has already spent brushing her teeth and texting her friend all together. Since the 1 hour is 40/40 subtract 39/40 from it to get 1/40. 1/40 is equal to the rest of the time Jenny spends reading or 1.5 minutes.
3 0
3 years ago
Read 2 more answers
Two friends, Darren and Michael, together earn $30 more than twice what Brian earns per month. If Darren and Michael together ea
kumpel [21]
Lets assign some variables: Let
y = Darren + Michael
x = Brian.
Given:
y = 2x + 30 (Darren and Michael [y] earn [=] 30 more than[+30] twice what Brian earns[2x])
y = 3800 (Darren and Michael [y] earn [=] $3800)
Solve for x: What Brian earns.

I will solve this by substitution. Plugging in 3800 for y:
3800 = 2x + 30 subtract 30 from both sides
3770 = 2x divide by 2 on both sides
1885 = x flip the equation
x = 1885
Brian earns $1885 per month.
4 0
3 years ago
What is the solution tot the system of equations graphed below
Slav-nsk [51]
D.
-3 = 2 (2) - 7
-3 = 4 - 7
-3 = -3

-3 = -2 -1
-3 = -3
7 0
4 years ago
Read 2 more answers
Please answer quickly thanks
Anastaziya [24]
8/3 = 2 2/3 and -11/3 = -3 2/3
so the middle line is 0 and each big line is 1.
Put the first dot on 2 2/3 or right before the 3rd big line.
Put the second dot on -3 2/3 or the line right after the 4th big line going back from 0
3 0
4 years ago
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