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
ira [324]
3 years ago
12

If 18 is more than 2 times a number is -10, what is the number

Mathematics
1 answer:
AleksAgata [21]3 years ago
7 0

Answer:

-14

Step-by-step explanation:

-10-18=-28 -28/2=-14

You might be interested in
A collection of 20 coins made up of only nickels, dimes, and quarters has a total value of $3.35. If the dimes were nickels, the
Kay [80]

Answer:  The required number of quarters in the collection is 11.

Step-by-step explanation:  Given that a collection of 20 coins made up of only nickels, dimes and quarters has a total value of $3.35.

If the dimes were nickels, the nickels were quarters and the quarters were dimes, the collection of coins would have a total value of $2.75.

We are to find the number of quarters in the collection.

Let x, y and z represents the number of nickels, dimes and quarters respectively in the collection.

We will be using the following values of nickels, dimes and quarters in form of dollar :

1 nickel = $ 0.05,   1 dime = $ 0.10   and    1 quarter = $0.25.

Then, according to the given information, we have

x+y+z=20\\\\\Rightarrow x=20-y-z~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)\\\\0.05x+0.10y+0.25z=3.35\\\\\Rightarrow 5x+10y+25z=335\\\\\Rightarrow x+2y+5z=67~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(ii)\\\\0.05y+0.25x+0.10z=2.75\\\\\Rightarrow 5y+25x+10z=275\\\\\Rightarrow y+2z+5x=55~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(iii)

Substituting the value of x from equation (i) in equations (ii) and (iii), we have

(20-y-z)+2y+5z=67\\\\\Rightarrow y+4z=47\\\\\Rightarrow y=47-4z~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(iv)

and

y+2z+5(20-y-z)=55\\\\\Rightarrow -4y-3z=-45\\\\\Rightarrow y=\dfrac{45-3z}{4}~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(v)

Comparing the values of y from equations (iv) and (v), we get

47-4z=\dfrac{45-3z}{4}\\\\\Rightarrow 188-16z=45-3z\\\\\Rightarrow 16z-3z=188-45\\\\\Rightarrow 13z=143\\\\\Rightarrow z=\dfrac{143}{13}\\\\\Rightarrow z=11.

Thus, the required number of quarters in the collection is 11.

7 0
2 years ago
Math please help I don’t understand at all
klio [65]

Answer:

the x and y axis arent clear enough to tell their coordinations can you take the picture again but it has to be clear

5 0
2 years ago
Jasmine left the house at 7:10 am to go to work. She gets back at 6:35 pm. How long is she out of the house?
Minchanka [31]
11 hours, 15 minutes
7 0
3 years ago
Read 2 more answers
3. What are the coordinates of the points of tangency of the two tangent lines through the point (1,1) each tangent to the circl
VashaNatasha [74]

Answer:y+x=2    

Step-by-step explanation:

Given

equation of circle x^2+y^2=1

Equation of tangent passing through (1,1)

Slope of tangent is given by differentiating equation of circle

2x+2y\frac{\mathrm{d} y}{\mathrm{d} x}=0

\frac{\mathrm{d} y}{\mathrm{d} x}=\frac{-x}{y}

at (x,y)=(1,1)

\frac{\mathrm{d} y}{\mathrm{d} x}=\frac{-1}{1}

Equation of line with slope

m=\frac{y-y_0}{x-x_0}

-1=\frac{y-1}{x-1}

y+x=2    

7 0
2 years ago
A person places $13900 in an investment account earning an annual rate of 2.8%, compounded continuously. Using the formula V = P
Otrada [13]

Answer

hmm

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Other questions:
  • What is the diameter of a circle that has an area of 452.16 mm 2
    7·2 answers
  • The U.S. Bureau of Labor Statistics reports that of persons who usually work full-time, the average number of hours worked per w
    9·1 answer
  • What is the hypothesis in the following conditional
    15·1 answer
  • A basketball player averages 12.5 points per game. There are 24 games in a season. At this rate, how many points would the playe
    9·2 answers
  • Mrs. Welch and her 7 children are shopping at a local grocery store. Each of the children will be allowed to select one box of c
    9·1 answer
  • The distance across the center of a hula-hoop is 2 feet. How much plastic is needed to make the
    11·1 answer
  • A survey results of a middle school shows that 3/20 of the students played football. what percentage of the students play footba
    15·1 answer
  • SOMEONE PLEASE PLEASE HELP I NEED THE ANSWERS YO BOTH PF THESE PLEASE
    15·1 answer
  • 11.724 divided by 6.<br> a. 1.954<br> b. 19.54<br> c. 1.104
    11·2 answers
  • I need this answered
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!