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
Serhud [2]
3 years ago
11

The sum of 3 numbers is 62. The first number can be represented by the variable x. The second number is 7 more than the first nu

mber, and the third number is 3 times the first number. What is the third number?
Mathematics
1 answer:
crimeas [40]3 years ago
7 0

Answer:

The third number = 33

Step-by-step explanation:

First number = x

Second number = x + 7

Third number = 3x

x + x + 7 + 3x = 62              Combine like terms

5x + 7 = 62                          Subtract 7 from both sides

5x = 62 - 7

5x = 55                                Divide by 5

5x/5 =  55/5

x = 11

You might be interested in
What system of inequalities is represented by the graph?
Juli2301 [7.4K]
One solution is the answer
6 0
3 years ago
Simplify the following expression:<br> 4x - 3y + 2z - 3x - y + 3z = ?
nordsb [41]
Add all the like terms together so 4x-3x is x or 1x -3y-y is -4y 2z+3z is 5z so put them all together it's x-4y+5z
7 0
3 years ago
Frank goes grocery shopping every 9 days Susan does her grocery shopping every sixth day the went shopping today and we're able
Marina CMI [18]
18 days. It is the least common denominator of the two numbers.
5 0
3 years ago
1. Your high school freshman class had a total of $1200 from fund-raisers during the year. To help
zysi [14]

Answer:

a is 67.20 and b is 1267.20

Step-by-step explanation:

first you have to multiply 1200 from 5.6% and you get 67.20 then you have to add 1200 to 67.20 and you get 1267.20

4 0
3 years ago
The 2008 Workplace Productivity Survey, commissioned by LexisNexis and prepared by World One Research, included the question, "H
LenaWriter [7]

Answer:

A 95% confidence interval estimate of the mean number of hours a legal professional works on a typical workday is [7.44 hours, 10.56 hours].

Step-by-step explanation:

We are given that x is normally distributed with a known standard deviation of 12.6.

A sample of 250 legal professionals was surveyed, and the sample's mean response was 9 hours.

Firstly, the pivotal quantity for finding the confidence interval for the population mean is given by;

                               P.Q.  =  \frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }  ~ N(0,1)

where, \bar X = sample average mean response = 9 hours

            \sigma  = population standard deviation = 12.6

            n = sample of legal professionals = 250

            \mu = mean number of hours a legal professional works

<em>Here for constructing a 95% confidence interval we have used One-sample z-test statistics as we know about population standard deviation.</em>

<u>So, 95% confidence interval for the population mean, </u>\mu<u> is ;</u>

P(-1.96 < N(0,1) < 1.96) = 0.95  {As the critical value of z at 2.5% level

                                                   of significance are -1.96 & 1.96}  

P(-1.96 < \frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } } < 1.96) = 0.95

P( -1.96 \times {\frac{\sigma}{\sqrt{n} } } < {\bar X-\mu} < -1.96 \times {\frac{\sigma}{\sqrt{n} } } ) = 0.95

P( \bar X-1.96 \times {\frac{\sigma}{\sqrt{n} } } < \mu < \bar X+1.96 \times {\frac{\sigma}{\sqrt{n} } } ) = 0.95

<u>95% confidence interval for</u> \mu = [ \bar X-1.96 \times {\frac{\sigma}{\sqrt{n} } } , \bar X+1.96 \times {\frac{\sigma}{\sqrt{n} } } ]

                                       = [ 9-1.96 \times {\frac{12.6}{\sqrt{250} } } , 9+1.96 \times {\frac{12.6}{\sqrt{250} } } ]

                                       = [7.44 hours, 10.56 hours]

Therefore, a 95% confidence interval estimate of the mean number of hours a legal professional works on a typical workday is [7.44 hours, 10.56 hours].

5 0
3 years ago
Other questions:
  • Whats the measure of XZ ?
    13·1 answer
  • Grade 7 students were surveyed to determine how many hours a day they spent on various activities. The results are shown in the
    12·1 answer
  • the base of a rectangle is three times as long as the height. of the perimeter is 64, what is the area of the rectangle
    10·1 answer
  • The volume of a crate is 48 cubic feet and the base is 16 sq ft . What is the height of the box
    13·2 answers
  • Given a square with two vertices of one side located at (-5, -3) and (-5, 12), in square units what is its area?
    10·1 answer
  • Round 47.58051 to the nearest thousandths
    9·1 answer
  • Given the side lengths, determine whether the triangle is acute, obtuse, right, or not a triangle: 8,15,23
    13·2 answers
  • -9x -2y=3<br> - 2x-y=-1<br> HELP ASAP
    5·1 answer
  • Match the information on the left with the appropriate equation on the right.
    9·1 answer
  • Directions: Use the figure to write the symbol for each.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!