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
Leno4ka [110]
3 years ago
6

I need some questions for grade 8 for algebraic manipulation

Mathematics
1 answer:
ki77a [65]3 years ago
6 0

Answer:

x + y + z + 13 ÷ m has

A. one term

B. two term

C. three term

D. four term

-2x + 5 + 10x - 9

3(x + 7) + 2(-x + 4) + 5x

6+3x-5y+7x-6y+2

2x - 8 = -x + 4

You might be interested in
Bailey company purchased a new delivery truck for $35,000. the sales tax was $2,000. the logo of the company was painted on the
iragen [17]
To find the cost of the truck, you will need to add all the expenses that incurred in addition to the actual cost of the truck.

35000 + 2000 + 1200 + 120 + 220 = 38540

The cost including expenses should be recorded as $38540.
7 0
2 years ago
The lesson of __________ is to forget about the money that’s irretrievably gone and instead to focus on the marginal costs and b
sattari [20]

Answer:sunk costs

Step-by-step explanation:

8 0
2 years ago
This scatter plot shows the relationship between students’ scores on the first exam in a class and their corresponding scores on
son4ous [18]

Answer:

D) 2 points

Step-by-step explanation:

Compare a couple of points in the clumps of points and that is your answer

7 0
3 years ago
The average THC content of marijuana sold on the street is 9.3%. Suppose the THC content is normally distributed with standard d
velikii [3]

Answer:

a) X \sim N(9.3,1)  

b) P(X>9.2)=P(\frac{X-\mu}{\sigma}>\frac{9.2-\mu}{\sigma})=P(Z>\frac{9.2-9.3}{1})=1-P(Z

c) The value of height that separates the bottom 75% of data from the top 25% is 9.9745.  

Step-by-step explanation:

1) Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

2) Part a

Let X the random variable that represent the heights of a population, and for this case we know the distribution for X is given by:

X \sim N(9.3,1)  

Where \mu=9.3 and \sigma=1

3) Part b

We are interested on this probability

P(X>9.2)

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(X>9.2)=P(\frac{X-\mu}{\sigma}>\frac{9.2-\mu}{\sigma})=P(Z>\frac{9.2-9.3}{1})=1-P(Z

4) Part c

For this part we want to find a value a, such that we satisfy this condition:

P(X>a)=0.25   (a)

P(X   (b)

Both conditions are equivalent on this case. We can use the z score again in order to find the value a.  

As we can see on the figure attached the z value that satisfy the condition with 0.75 of the area on the left and 0.25 of the area on the right it's z=0.6745. On this case P(Z<0.6745)=0.75 and P(z>0.6745)=0.25

If we use condition (b) from previous we have this:

P(X  

P(Z

But we know which value of z satisfy the previous equation so then we can do this:

z=0.6745

And if we solve for a we got

a=9.3 +1*0.6745=9.9745

So the value of height that separates the bottom 75% of data from the top 25% is 9.9745.  

8 0
3 years ago
Need to solve 5t-2r=25 for t
postnew [5]
5t = 25+2r
t = (25+2r)/5 or
t = 5 + (2/5)r
7 0
3 years ago
Other questions:
  • Jack bought 5 pounds of Halloween candy. He gave out 3 pounds of the candy to trick or treaters and ate 10 ouncess of the candy.
    13·2 answers
  • Can someone plz help 16x - 26c / x = ?
    15·1 answer
  • How do I know when to multiply divide subtract or add
    5·2 answers
  • If x=5 then what is x+1278436-888+946286-x+7+x?
    11·1 answer
  • How do I wrote Five less than the quotient of a number and 3 is -7
    10·1 answer
  • What is 5x times (3x^2 -5)
    14·1 answer
  • A science club at Emily's middle school has 25 members. Only 40% of the members attended Saturday meetings. What is the number o
    15·1 answer
  • Which models represent the sum?<br><br><br>1.1 + 0.6<br><br><br>Select each correct answer.
    8·1 answer
  • What common ratio would cause a geometric series to converge
    15·1 answer
  • Speed and time are _________ variable.​
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!