1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
scoundrel [369]
3 years ago
12

(8x2 + 5x – 9) - (3x2 – 5x + 1) = ?

Mathematics
1 answer:
Svetach [21]3 years ago
7 0

Answer:

10x

Step-by-step explanation:

You might be interested in
5 1/2 - 1 1/5 = <br> please ​
SpyIntel [72]

4.3 (decimal)

43/10 (fraction)

4 3/10 (mixed fraction)

3 0
3 years ago
Read 2 more answers
The amounts of time that customers stay in a certain restaurant for lunch is normally distributed with a standard deviation of 1
hammer [34]

Answer:

99% CI: [45.60; 58.00]min

Step-by-step explanation:

Hello!

Your study variable is:

X: Time a customer stays in a certain restaurant. (min)

X~N(μ; σ²)

The population standard distribution is σ= 17 min

Sample n= 50

Sample mean X[bar]= 51.8 min

Sample standard deviation S= 27.68

You are asked to construct a 99% Confidence Interval. Since the variable has a normal distribution and the population variance is known, the statistic to use is the standard normal Z. The formula to construct the interval is:

X[bar] ± Z_{1-\alpha /2}*(σ/√n)

Z_{1-\alpha /2} = Z_{0.995}= 2.58

Upper level: 51.8 - 2.58*(17/√50) = 45.5972 ≅ 45.60 min

Lower level: 51.8 + 2.58*(17/√50) = 58.0027 ≅58.00 min

With a confidence level of 99%, you'd expect that the interval [45.60; 58.00]min will contain the true value of the average time customers spend in a certain restaurant.

I hope you have a SUPER day!

PS: Missing Data in the attached files.

6 0
3 years ago
Read 2 more answers
Find the probability of landing on an even number when spinning the spinner below.
Mariulka [41]

Answer:

There are 8 numbers.

4 of the numbers are even ( 2, 4, 6, 8)


The probability is the number of even numbers over the total numbers:


4/8 which reduces to 1/2.


The answer is 1/2



3 0
3 years ago
A youth basketball coach has 12 kids on his team and he selects 5 kids to start each game. To be fair he wants to start a differ
alisha [4.7K]

_{12}C_5=\dfrac{12!}{5!7!}=\dfrac{8\cdot9\cdot10\cdot11\cdot12}{120}=792

792>20, so yeah, he will be able.

8 0
3 years ago
Plz help 25 pts and ill mark u brainliest
nika2105 [10]

Answer:

if your doing scientific notation then 2.7x10^3 would be the only one correct. if its not scientific notation then 27x10^3 would be more because it would be equivilent to <em>2700<27000</em>

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • the driving distance from the sports arena to Kristina's house in 10 9/10 miles. the distance from the sports arena to Luke's ho
    7·1 answer
  • 17. In a recent l0-year period, the change
    14·1 answer
  • Can you help me please?
    11·1 answer
  • Consider the function represented by 9x + 3y = 12 with x as the independent variable. How can this function be written using fun
    15·1 answer
  • A small town has 3500 families. The population mean (mu) number of children per family is = 3, with a population standard deviat
    5·1 answer
  • Find the area of the shape shown below.<br> 3<br> 3<br> 7<br> And it’s not 63
    14·1 answer
  • What is the decimal form of 45/129
    8·1 answer
  • Tim bought two 12 packs of soda for $4.99 each. If the sales tax is 3.5%, how much was the total cost of the sodas?
    11·2 answers
  • the scale on a map is 2 cm = 25 miles .Dave measured the distance to the next town at 5 cm.How many miles away is the next town?
    8·2 answers
  • What is the answer ?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!