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
Firlakuza [10]
3 years ago
15

Point e is between points d and f. If DE=x-4,EF=2x+5 and DF=4x-8, find x number 17 help please

Mathematics
2 answers:
Murljashka [212]3 years ago
4 0
DF =DE + EF
4x-8 = x-4 + 2x+5 
4x - 8 = 3x + 1
4x - 3x = 1 + 8
x = 9

Anna007 [38]3 years ago
4 0

Answer:  The required value of x is 9.

Step-by-step explanation:  Given that point E is between the points D and F.

Also, DE = x - 4, EF = 2x + 5  and DF = 4x - 8.

We are to find the value of x.

Since the point E lies between the points D and F, so we must have

DE+EF=DF\\\\\Rightarrow (x-4)+(2x+5)=4x-8\\\\\Rightarrow 3x+1=4x-8\\\\\Rightarrow 4x-3x=1+8\\\\\Rightarrow x=9.

Thus, the required value of x is 9.

You might be interested in
How do you make system equations from a word problem?
astra-53 [7]
Where is the problem tho?
7 0
3 years ago
What are the solutions of 2x2 + 16x + 34 = 0?
Anni [7]
2x^2 + 16x + 34 = 0
x^2 + 8x + 17 = 0
x^2 + 8x + 16 = -17 + 16 = -1
(x + 4)^2 = -1
x + 4 = sqrt(-1) = ±i
x = -4 <span>±</span> i
8 0
3 years ago
Read 2 more answers
4)In order to set rates, an insurance company is trying to estimate the number of sick daysthat full time workers at an auto rep
bagirrra123 [75]

Answer:

A sample of 18 is required.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.92}{2} = 0.04

Now, we have to find z in the Z-table as such z has a p-value of 1 - \alpha.

That is z with a pvalue of 1 - 0.04 = 0.96, so Z = 1.88.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

A previous study indicated that the standard deviation was 2.2 days.

This means that \sigma = 2.2

How large a sample must be selected if the company wants to be 92% confident that the true mean differs from the sample mean by no more than 1 day?

This is n for which M = 1. So

M = z\frac{\sigma}{\sqrt{n}}

1 = 1.88\frac{2.2}{\sqrt{n}}

\sqrt{n} = 1.88*2.2

(\sqrt{n})^2 = (1.88*2.2)^2

n = 17.1

Rounding up:

A sample of 18 is required.

3 0
3 years ago
Fast I will give brainlist The total number of seats in a movie theater is calculated by adding the area of the upper section gi
Blizzard [7]

Answer:

(888)

Step-by-step explanation:

okay u stupi if u ont kno jkjk i ont kno byee

5 0
3 years ago
a bag of peaches has 3 more than 2 times the number of bananas in a bag of bananas. if there are 17 peaches in a bag, how many b
Harlamova29_29 [7]

this can be turned into an equation to be solved more easily. so the amount of bananas can be x. there are 17 peaches. So the equation would be:

(17 - 3) ÷ 2 = x

you begin with what's inside the parenthesis

17 - 3 = 14.

14 ÷2 = 7

x = 7

there are 7 bananas in the bag of bananas

7 0
3 years ago
Other questions:
  • If y varies jointly with x and z, what is the constant of proportionality when y=30, x=4, and z=5?
    8·1 answer
  • Please answer quickly. I really need help!!!
    9·1 answer
  • $. 15 to 18<br> what is the percentage of 15 to 18
    12·1 answer
  • How many pounds of a 15% copper alloy must be mixed with 700lb of a 30% copper alloy to make a 25.5% copper alloy?
    8·1 answer
  • Help me please ! I don’t get this topic
    6·1 answer
  • How many hours will it take a bicyclist traveling 17.6 feet per second to finish a 90 mike race round your answer if necessary t
    14·1 answer
  • -8 + 4m = 2. What is m?​
    13·1 answer
  • What is the slope of 2x-5y=9
    11·2 answers
  • Divide x² + 11x + 16 by x + 8​
    13·1 answer
  • Please help I'm lost
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!