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
aev [14]
2 years ago
7

the sum of three numbers is 131. the third number is 4 times the first. the second number is 5 more than the first. what are the

numbers
Mathematics
1 answer:
Sphinxa [80]2 years ago
4 0

Step-by-step explanation:

let the numbers are:

a, b, and c

the equation would be:

a+b+c = 131

c = 4a

b = a+5

=>

a + a+5 +4a = 131

6a +5 = 131

6a = 131-5

6a = 126

a= 126/6

a = 21

b = a+5 = 21+5

b = 26

c = 4a = 4(21)

c = 84

You might be interested in
A farmhouse shelters 16 animals, some are pigs, and some are ducks. Altogether there are 42 legs. How many pigs are there?
zalisa [80]

Answer:

5 pigs

Step-by-step explanation:

A farmhouse shelters 16 animals, some are pigs, and some are ducks. Altogether there are 42 legs. How many pigs are there?

Let us represent:

Number of pigs = x

Number of ducks = y

Our system of equations is given as:

A farmhouse shelters 16 animals, some are pigs, and some are ducks.

x + y = 16...... Equation 1

x = 16 - y

Altogether there are 42 legs.

Ducks have 2 legs(feet) , pigs have 4 legs,

4x + 2y = 42..... Equation 2

We substitute

16 - y for x in Equation 2

Hence:

4(16 - y) + 2y = 42

64 - 4y + 2y = 42

Collect like terms

- 4y + 2y = 42 - 64

-2y =- 22

y = -22/-2

y = 11 ducks

Solving for x.

x = 16 - y

x = 16 - 11

x = 5 pigs

Therefore, we have 5 pigs

7 0
2 years ago
Does any know this answer
vichka [17]
F(n) = 75*1/5n

This is because the base value would be 75 and it is divided by 5 each part of the sequence. 
5 0
3 years ago
Round your answer to one decimal digit. The volume of a cylinder is 1800cm squared. if the height of the cylinder is 40cm then t
jonny [76]

_____________________________________

\sf\huge\underline\red{SOLUTION:}

Use formula:

\sf{V = \pi(\frac{d}{2})^2h}

Solving for diameter:

\sf d = 2 \times  \sqrt{ \frac{V}{\pi h} }  \\ \sf = 2 \times   \sqrt{ \frac{40}{\pi \times 1800} } \approx0.16821 \\  = \sf \large\boxed{\sf{\green{d = 0.17}}}

\sf\huge\underline\red{FINAL \: ANSWER}

\large\boxed{\sf{\green{d=0.17}}}

_____________________________________

✍︎ꕥᴍᴀᴛʜᴅᴇᴍᴏɴǫᴜᴇᴇɴꕥ

✍︎ᴄᴀʀʀʏᴏɴʟᴇᴀʀɴɪɴɢ

8 0
2 years ago
Please help mee you will get 100 points
professor190 [17]

Answer:

Equation: 15 - f = n

Answer: n = 9

Step-by-step explanation:

The question is asking to write the equation. The equation would be

"15 - f = n" where f  shirts folded

n = shirts remaining to fold

Then the question has gave us the value of f and has told us to solve it. Below is the solution.

15 - 6 = n

=> n = 9

Therefore, there is 9 shirts remaining after 6 of them are folded.

What did we solve?

We wrote our equation and solved what was required in the question.

I hoped this helped.

If possible... May I have brainliest :)

8 0
2 years ago
Read 2 more answers
-5x^2-6=-4x using the Quadratic Formula.
a_sh-v [17]

Answer:

Step-by-step explanation:

-5x² - 6 = -4x

-5x² + 4x - 6 = 0

a = -5  ; b = 4  ; c = -6

Discriminant = b² - 4ac

                     = 4² - 4*(-5)*(-6)

                     = 16 - 120

                     = -104

roots = \dfrac{-b+\sqrt{D}}{2a} \ ; \   \dfrac{-b-\sqrt{D}}{2a}

=\dfrac{-4+\sqrt{-104}}{2*(-5)};\dfrac{-4-\sqrt{-104}}{2*(-5)}\\\\=\dfrac{-4+2i\sqrt{26}}{-10} ; \dfrac{-4-2i\sqrt{26}}{-10}\\\\=\dfrac{(-2)[2-i\sqrt{26}]}{-10} \ ; \ \dfrac{(-2)[2+i\sqrt{26}]}{-10}\\\\=\dfrac{2-i\sqrt{26}}{5} \ ; \ \dfrac{2+i\sqrt{26}}{5}

5 0
2 years ago
Other questions:
  • Antonia buys a 5-pound bag of onions at the store for $2.65. To the nearest cent, how much did she pay for 1 pound of onions?
    11·2 answers
  • Let x be the size of a house (sq ft) and y be the amount of natural gas used (therms) during a specified period. Suppose that fo
    6·1 answer
  • Louis weighs five more pounds than Carla. Carla weighs two more pounds than Rita. The combined weight
    12·1 answer
  • Add or subtract 1/4 + 7/4=
    15·2 answers
  • Could someone please help me out with this?​
    7·2 answers
  • Y = 2x - 4 y = x + 1<br><br>Solve using substitution. ​
    8·2 answers
  • The sum of the ages of the father and son is 44 years .After 8 years the age of the father will be twice the age of the son . Fi
    7·1 answer
  • If x =7/8 cm, y =1/4 cm, and z = 5/8 cm, what is the volume of the rectangular prism above?
    10·2 answers
  • How can we write 4y = 5x - 12 in y = mx + b?
    10·2 answers
  • A civil engineer is mapping the overhead clearance of his family’s property on a coordinate grid. The ground is represented by t
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!