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
gtnhenbr [62]
2 years ago
9

I need help with 18-19​

Mathematics
2 answers:
Svet_ta [14]2 years ago
8 0

Answer:

18-19= -1  

Step-by-step explanation:

18-19=-1

Sweetheart, you cant subtract a smaller number from an bigger number or it will be a negitive number so the answer is -1

elena-s [515]2 years ago
8 0

Answer:

18. p = 5

19. b = 8

Step-by-step explanation:

all you have to do is apply the inverse of the number being added to the variable to the other side of the equation to balance the equation. And if you are ever stuck there are great algebra calculators online. For example MathPapa. Good luck

You might be interested in
ecn 221 The lengths of brook trout caught in a certain Colorado stream are normally distributed with a mean of 14 inches and a s
iren [92.7K]

Answer:

a=14 -0.842*3=11.474

So the value of height that separates the bottom 20% of data from the top 80% is 11.474.  

Step-by-step explanation:

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".  

Solution to the problem

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

X \sim N(14,3)  

Where \mu=14 and \sigma=3

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

P(X>a)=0.8   (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 0.2 of the area on the left and 0.8 of the area on the right it's z=-0.842. On this case P(Z<-0.842)=0.2 and P(z>-0.842)=0.8

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=-0.842

And if we solve for a we got

a=14 -0.842*3=11.474

So the value of height that separates the bottom 20% of data from the top 80% is 11.474.  

6 0
3 years ago
A triangular prism has a height of 6 meters and a triangular base with the following dimensions.
Novosadov [1.4K]
The value of B is 48m. squared
This is because the formula for a triangle is (length×hight÷2)

So in this case, multiply 16 and 6 to get 96. Then divide 96 by 2 to get 48m. squared
4 0
3 years ago
Read 2 more answers
Need Help Please!!<br>Enter an inequality that represents the graph in the box. 
dybincka [34]
Y<3x+1 but there is a line under the less than sign
8 0
3 years ago
Read 2 more answers
Terri has a jar of orange, blue, green, and red chocolate candies. In the jar are 75 orange candies, 62 blue candies, and 52 gre
Keith_Richards [23]

Answer:

0.25

Step-by-step explanation:

Givens

orange: 75

Blue: 62

Green: 52

Red:  x

Total: 252

Equation

75 + 62 + 52 + x = 252        Collect the like terms on the left.

Solution

189 + x = 252                       Subtract 189 from both sides

x = 252 - 189

x = 63                                   Red Ones

Probability

P(Red) = 63/252

P(Red) = 0.25

3 0
3 years ago
I need some help on this question. Segment LM is the midsegment of trapezoid ABCD. AB=48, and DC=88. What is LM? I am not sure h
agasfer [191]
AB=48, DC=88

48+88=136
136÷2=68

Answer: LM=68
Remember that the length of the mid segment in a trapezoid is half the sum of the base lengths.
4 0
3 years ago
Other questions:
  • angie puts 1 stamp on each envelopes. she puts stamps on 7 envelopes. how many stamps does angie use?
    8·2 answers
  • All puppies are cute. how can i write this as a conditional?
    6·2 answers
  • Justin is at the amusement park for 7 hours. the number of rides he goes on depends on how long the line is for each ride. is th
    6·1 answer
  • Describe the relationship between n and 4 that will make the value of the expression 7x n/4 greater than 7
    5·1 answer
  • Graph the line with slope -1/4 and y-intercept 4​
    15·1 answer
  • List 5 rational numbers between -4by5. And. -2by3
    12·1 answer
  • Becky wants to eat 1/4 of a small pumpkin pie. which if the following statements are correct? select all that apply
    10·1 answer
  • Whats 4 1/5% of 50?Write your answer as a decimal.Make sure your answer is fully reduced.
    10·2 answers
  • Find L<br> 10in 6in<br> L=__in
    14·1 answer
  • If four ounces of orange juice contain 50 calories, how many ounces of orange juice will have 175 calories
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!