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
iris [78.8K]
3 years ago
10

The sum of twice a number and three is 21. find the number

Mathematics
1 answer:
Alisiya [41]3 years ago
7 0

Answer:

sum of twice a number and three is 21

2x + 3 = 21

x = 9

You might be interested in
5. Which number lies between -5 and -6 on a number line? *
jeyben [28]
The answer is B because -26/5= -5.2
3 0
2 years ago
Can someone put true or false? Please make sure you answer is correct and label them like this:
uysha [10]
1. true.
2. false.
3. false.
4. true.

these should be correct.
4 0
2 years ago
Express the number 20000 as a single digit integer times a power of 10
PolarNik [594]
The answer is 2 x 10^4 or 2 to the power of 4 (4th power) where;
2  x 10 x 10 x 10 x 10
2 x 10 =20
20 x 10= 200
200 x 10 = 2000
2000 x 10 = 20 000

Expressing a number to a single digit integer times a power of 10 is also writing a number in scientific form,where the number is multiplied by 10 to nth "power". Scientific notation is also called standard index form whereby, too large or too big numbers.
In writing the scientific notation of a number it follows this form: m x 10^n ( m is multiplied to 10 to the power of n)  where, m, the coefficient, is the real number and n is the exponent integer.<span><span /></span>

3 0
3 years ago
PLEASE HELP!!! Show your work too, please!
dimulka [17.4K]

Step-by-step explanation:

first fish tank: 95-4x

second fish tank: 40+5x

1. Define variable

The variable x represents the number of days.

2. Write the inequality

<em>95-4x=40+5x</em>

<em />

3. You probably don't need the answer but I am just going to solve.

The first fish tank will have less water than the second fish tank after 7 days.

<em>95-4x=40+5x </em>

<em>95-4(7)=40+5(7)</em>

<em>95-28=40+35</em>

<em>67=75</em>

<em>Since the first equation (95-4x) represents the first fish tank, and the second equation (40+5x) represents the second fish tank, the solution shows how the amount of water in the first fish tank is less than the amount of water un the second fish tank after 7 days.</em>

8 0
3 years ago
Read 2 more answers
If m&lt; xyz=68 and m Mee!
torisob [31]

Answer:

Angle ZXY = 41 degrees.

Step-by-step explanation:

If WX is parallel to ZY then angle XZY = 71 degrees.

Angle ZXY = 180 - 68 - 71 = 41 degrees.

3 0
2 years ago
Other questions:
  • A family has two cars. the first car has a fuel efficiency of 30 miles per gallon of gas and the second has a fuel efficiency of
    11·1 answer
  • Camille knew that a triangle had one side with a length of 16 inches and another side with a length of 20 inches. She did not kn
    8·1 answer
  • NEED HELP WITH FUNCTION AND RANGE AND DOMAIN PLZ HELP
    13·1 answer
  • Please help find surface area!!
    6·1 answer
  • 4x-y=1 inslope intercept form please show work
    6·1 answer
  • How do you write 3.25 in simplest form
    11·2 answers
  • Doug needs a ladder that is at least 12 meters long. he has a ladder that is 30 feet long. about how many feet too short is this
    11·2 answers
  • For this question I am sure the answer is 81% as you divide 45 and 55. However, it is stating my answer is incorrect even though
    6·1 answer
  • Help help this is 10 points
    13·1 answer
  • 12 pleaseeeee help meeeee!
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!