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
chubhunter [2.5K]
3 years ago
7

Which expression is equivalent to 20-4x/4 a. 5-xb. 5-4xc. 20-xd. 80-16x

Mathematics
2 answers:
Reil [10]3 years ago
3 0
If you simplify the problem, you're left with 5-x (20\4=5 and -4x\4=-x)
Nutka1998 [239]3 years ago
3 0
The answer is C. 20-x
You might be interested in
The following parts refer to the letters: LAMEFIREALARM. Recall that "word" means distinguishable letter arrangements. (a) How m
larisa86 [58]

Answer:

Step-by-step explanation:

The word "LAMEFIREALARM" word consists of

2L , 2M, 2E , 2R , 3A , F and I

no of words with the above letters such that M's are not together

=Total No of words- M's are together

Total no of words=\frac{13!}{4\times 2!\times 3!}=64,864,800

When M's are together . considering 2 M's as one

therefore there are \frac{12!}{3\times 2!\times 3!}=9,979,200

No of ways=\frac{13!}{4\times 2!\times 3!}-\frac{12!}{3\times 2!\times 3!}=54,885,600

(b)No of ways such that M's are separated by at least 2 letters

at least  2 letter means 2 letter, 3 letter ......11 letters

So we have to subtract no of ways where there are 1 letter in between M's from total no of ways where 2 M's are not next to each other

No of ways in which there is 1 letter between 2 M's

This can be done by considering 11 cases

In first case Place first M in Starting Position and 2 M on third place

Second case place First M in 2 nd Position and second M on 4 th place

Similarly For 11th case

Place first M in 11th place and second M on 13th place

Total ways

=\frac{11\times 11!}{3!\times 2!\times 2!\times 2!}

So , the total number of arrangements of the letters of the word LAMEFIREALARM where the two M's are separated by atleast two letters is

=\frac{13!}{4\times 2!\times 3!}-\frac{12!}{3\times 2!\times 3!}-\frac{11\times 11!}{3!\times 2!\times 2!\times 2!}

=45738000

7 0
3 years ago
Which number comes next in this series<br> A) 4<br> B) 21<br> C) 31<br> D) 34
Greeley [361]
What is the series you are referring too?
3 0
3 years ago
An airplane flies 315 km in 1 hour 45 minutes. Calculate the average speed.
valentina_108 [34]

Answer:

3 km per minute

Step-by-step explanation:

speed = distance / time

315km/105 minutes

= 3 km per minute

4 0
2 years ago
Use the table of systolic blood pressures (in mm Hg) in each arm
e-lub [12.9K]

Answer:

The 90% confidence interval would be given by (63.330;81.070)

Step-by-step explanation:

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

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".

Let put some notation

x=left arm , y = right arm

x: 175 169 182 146 144

y: 102 101 94 79 79

Since the Confidence is 0.90 or 90%, the value of a = 0.1 and a/2= 0.05we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.05,4)".And we see that ta/2= 2.13

3 0
2 years ago
A 4-pint carton of pineapple juice costs $8.08. What is the price per quart?<br><br> $
Elena L [17]

Answer:

2.02

hope this helps

6 0
3 years ago
Other questions:
  • Q ÷ 2 -qp ÷ 6; let p = -6 and q = 10
    15·1 answer
  • Your having lunch at Taco Bell. You have your choice of a taco,burrito or Mexican pizza. You can choose between rice and beans.
    15·2 answers
  • Bella weighs 3 pounds. When she is an adult​ cat, she will weigh about 435​% as much as her current weight. Write 435​% as a fra
    13·1 answer
  • Classify the triangle based on angle measures.
    6·1 answer
  • Given the equation 2 Square root of x minus 5 = 2, solve for x and identify if it is an extraneous solution.
    10·2 answers
  • Which describes a parameter of a population?
    5·2 answers
  • What is the range of the data vaules 777521001346
    12·1 answer
  • Solve the following system of linear equations by substitution and determine whether the system has one solution, no solution, o
    5·1 answer
  • Prove the identity and include the rule
    11·1 answer
  • Each of 100 people receives a random item from a grocery store and assigns it a value between 1 (low) and 10 (high). They trade
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!