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cupoosta [38]
3 years ago
10

The expression (3x²+x+8) + (x?- 9) is equivalent to?

Mathematics
1 answer:
Andrei [34K]3 years ago
8 0

Answer: 3x^2+2x-1

Step-by-step explanation:

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Please help me find out what x=
Lunna [17]
X = 47
you subtract 133 from 180
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3 years ago
I WILL AWARD BRAINLIEST!! PLEASE HELP!!
Sergeeva-Olga [200]

xy \:  = product \\ xn \times 2y = 2nxy \\

the product will increase by 2n

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3 years ago
Coach Posey has $10,000 to invest. He can go to Bryant Bank that pays 5% simple interest or Hornets Bank that pays 4% interest c
Zinaida [17]
Here's what we know: Coach Posey has $10,000, and will be hypothetically investing in Bryant Bank for 12 years at 5% simple interest.

We can calculate the interest with the formula I = prt, where I is the interest, p is the principal (starting amount), r is the rate, and t is the amount of time.

I = $10,000(0.05)(12)
I = $10,000(0.6)
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He started with $10,000, and earned $6,000 interest, so he has $10,000 + $6,000, or $16,000.

5 0
3 years ago
Four teachers offer an after-school chess club. The table shows the number of
madam [21]

Using proportions, it is found that the least number of teams that will include all of the students is of 10.

<h3>What is a proportion?</h3>

A proportion is a fraction of a total amount, and the measures are related using a rule of three.

In this problem, 12 + 36 + 9 = 57 students will be divided into teams of no more than 6 students, hence:

57/6 = 9.5.

Rounding up, the least number of teams that will include all of the students is of 10.

More can be learned about proportions at brainly.com/question/24372153

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5 0
2 years ago
A local pizza store knows the mean amount of time it takes them to deliver an order is 45 minutes after the order is placed. The
Bad White [126]

Answer:

We need to conduct a hypothesis in order to check if the true mean is different from 45(alternative hypothesis), and then the system of hypothesis would be:  

Null hypothesis:\mu =45  

Alternative hypothesis:\mu \neq 45  

Since we don't know the sample size we can't calculate the statistic and the only thing that we can do is create the sytem of hypothesis.

Step-by-step explanation:

Data given and notation  

\bar X=48 represent the sample mean    

s=10 represent the sample standard deviation

n sample size  

\mu_o =45 represent the value that we want to test  

\alpha=0.05 represent the significance level for the hypothesis test.  

z would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

System of hypothesis

We need to conduct a hypothesis in order to check if the true mean is different from 45(alternative hypothesis), and then the system of hypothesis would be:  

Null hypothesis:\mu =45  

Alternative hypothesis:\mu \neq 45  

Since we don't know the sample size we can't calculate the statistic and the only thing that we can do is create the sytem of hypothesis.

5 0
3 years ago
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