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Alborosie
3 years ago
14

Which algebraic expression represents “ six less than a number “

Mathematics
2 answers:
nevsk [136]3 years ago
7 0

Answer:

x-6

Step-by-step explanation:

i believe this is correct.

Sloan [31]3 years ago
4 0
X - 6 is th algebraic expession for six lss than a number. x represents the number and you are taking 6 away from it. This is the basis of all algebra
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A 6 pound bag of oranges cost 6.78 What is the unit price?
oksano4ka [1.4K]

Answer:

$1.13

Step-by-step explanation:

Since 6 pound bag of oranges costs $6.78...

\frac{6.78}{6}

Now, let's divide 6.78 in to 6 to find our unit price.

\frac{1.13}{1}

Now we know 1 pound, (our unit price), costs...

$1.13

5 0
3 years ago
The temperature at noon on a winter day was 8°C. At midnight, the temperature had dropped 15°C. What was the temperature at midn
klio [65]
All you have to look at is the word "dropped" and you know it's a subtraction problem. In this case, it would be 8 - 15.

8 - 15 = -7

It would be -7<span>°C at midnight. I hoped this helped! :)</span>
6 0
3 years ago
A veterinarian wants to know if pit bulls or golden retrievers have a higher incidence of tooth decay at the age of three. The v
BigorU [14]

Answer: B) [-0.0332,0.1332]

Step-by-step explanation: <u>Confidence</u> <u>Interval</u> is an interval where we can be a percentage sure the true mean is.

The confidence interval for a difference in population proportion is calculated following these steps:

First, let's find population proportion for each population:

p_{1}=\frac{30}{120}=0.25

p_{2}=\frac{32}{160}=0.2

Second, calculate standard deviation for each proportion:

\sigma_{1}=\sqrt{\frac{0.25(0.75)}{120} } = 0.0395

\sigma_{2}=\sqrt{\frac{0.2(0.8)}{160} } = 0.0316

Now, we calculate standard error for difference:

SE=\sqrt{\sigma_{1}^{2}+\sigma_{2}^{2}}

SE=\sqrt{0.0395^{2}+0.0316^{2}}

SE = 0.0505

The z-score for a 90% CI is 1.645.

Then, confidence interval is

p_{1}-p_{2} ± z-score.SE

0.25-0.2 ± 1.645(0.0505)

0.05 ± 0.0831

The limits of this interval are:

inferior: 0.05 - 0.0831 = -0.0332

superior: 0.05 + 0.0831 = 0.1332

The 90% confidence interval for the difference in the population proportion of pit pulls and golden retrievers is [-0.0332,0.1332].

8 0
3 years ago
Jessica has bought 18 pounds of dog food. She feeds her dog 2/3 pounds for each meal. For how many meals will the food last?
MAXImum [283]

Answer:

27 days

Step-by-step explanation:

It is a simple division question

18 / (2/3)

Multiply by reciprocal

18 * 3 / 2 = 27

7 0
3 years ago
Read 2 more answers
Convert 3.212121… into a fraction using variable
seraphim [82]

Answer:

In fraction it is

\frac{3212121}{1000000}

<h2>#NoNeedFriends</h2>
3 0
2 years ago
Read 2 more answers
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