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
stepan [7]
3 years ago
14

50 is 20% of what number

Mathematics
1 answer:
Tresset [83]3 years ago
6 0
20% of a number is 1/5th of it so 50 × 5 is 250
You might be interested in
Any 10th grader solve it <br>for 50 points​
kkurt [141]

Answer:

\frac{a}{p}\times (q-r)+\frac{b}{q}\times (r-p)+\frac{c}{r}\times (p-q)\neq 0  is proved for the sum of pth, qth and rth terms of an arithmetic progression are a, b,and c respectively.

Step-by-step explanation:

Given that the sum of pth, qth and rth terms of an arithmetic progression are a, b and c respectively.

First term of given arithmetic progression is A

and common difference is D

ie., a_{1}=A and common difference=D

The nth term can be written as

a_{n}=A+(n-1)D

pth term of given arithmetic progression is a

a_{p}=A+(p-1)D=a

qth term of given arithmetic progression is b

a_{q}=A+(q-1)D=b and

rth term of given arithmetic progression is c

a_{r}=A+(r-1)D=c

We have to prove that

\frac{a}{p}\times (q-r)+\frac{b}{q}\times (r-p)+\frac{c}{r}\times (p-q)=0

Now to prove LHS=RHS

Now take LHS

\frac{a}{p}\times (q-r)+\frac{b}{q}\times (r-p)+\frac{c}{r}\times (p-q)

=\frac{A+(p-1)D}{p}\times (q-r)+\frac{A+(q-1)D}{q}\times (r-p)+\frac{A+(r-1)D}{r}\times (p-q)

=\frac{A+pD-D}{p}\times (q-r)+\frac{A+qD-D}{q}\times (r-p)+\frac{A+rD-D}{r}\times (p-q)

=\frac{Aq+pqD-Dq-Ar-prD+rD}{p}+\frac{Ar+rqD-Dr-Ap-pqD+pD}{q}+\frac{Ap+prD-Dp-Aq-qrD+qD}{r}

=\frac{[Aq+pqD-Dq-Ar-prD+rD]\times qr+[Ar+rqD-Dr-Ap-pqD+pD]\times pr+[Ap+prD-Dp-Aq-qrD+qD]\times pq}{pqr}

=\frac{Arq^{2}+pq^{2} rD-Dq^{2} r-Aqr^{2}-pqr^{2} D+qr^{2} D+Apr^{2}+pr^{2} qD-pDr^{2} -Ap^{2}r-p^{2} rqD+p^{2} rD+Ap^{2} q+p^{2} qrD-Dp^{2} q-Aq^{2} p-q^{2} prD+q^{2}pD}{pqr}

=\frac{Arq^{2}-Dq^{2}r-Aqr^{2}+qr^{2}D+Apr^{2}-pDr^{2}-Ap^{2}r+p^{2}rD+Ap^{2}q-Dp^{2}q-Aq^{2}p+q^{2}pD}{pqr}

=\frac{Arq^{2}-Dq^{2}r-Aqr^{2}+qr^{2}D+Apr^{2} -pDr^{2}-Ap^{2}r+p^{2}rD+Ap^{2}q-Dp^{2}q-Aq^{2}p+q^{2}pD}{pqr}

\neq 0

ie., RHS\neq 0

Therefore LHS\neq RHS

ie.,\frac{a}{p}\times (q-r)+\frac{b}{q}\times (r-p)+\frac{c}{r}\times (p-q)\neq 0  

Hence proved

5 0
3 years ago
Hiii please help i’ll give brainliest if you give a correct answer please thanks!
Archy [21]

Answer:

1. 12

2. the prism with a length of 7  1/2 will have a shorter width, with a width of 6

8 0
2 years ago
192/38 with remanders
guapka [62]

Answer:

5 Remainder 2

3 0
2 years ago
Read 2 more answers
Mary leaves her house to take a walk. The graph shows the distance, d, in feet from
andrew-mc [135]
D. 35, since that would be the longest amount. of time walking away from her house, she should be the farthest amount of feet away from her house
7 0
3 years ago
Help!!!! If you wanted to model movements with both of the robot's arms in the air, what function
mixas84 [53]

Answer:

f(x)=x^2

Step-by-step explanation:

if you wanted have a function where both of the robot's arms are in the air the function could be x to the power of any even number such f(x)=x^2, f(x)=x^4, f(x)=x^6, or even f(x)=x^10. And you could still do the same transformations with these equations.

3 0
3 years ago
Other questions:
  • Simplify: 1. 4x−(1−2x)+(2x−7) 2. (3−0.4a)−(10−0.8a)
    13·1 answer
  • Write the equation of the line with an undefined slope, passing through the point (2, 5).
    13·1 answer
  • What is the standard form of the equation of a circle with the radius ( r=6) and the center (h,k)= (0,0)?
    6·1 answer
  • The estimated difference between two numbers is 60. Find two numbers that when rounded to the nearest ten, have a difference of
    5·1 answer
  • 3 4a - 2 = 3r + d. for a
    14·1 answer
  • (2⁵ + 14 ÷ 2) • 2 pls help ;-;
    13·1 answer
  • How much bigger is TR (200) than TR (199)?
    14·1 answer
  • If f(x) = 2x - 1 and g(x) = 2x + 1, evaluate f(g(x)) when x = -3
    7·1 answer
  • Two bottles of water have a mass of 4 kilograms. How many grams is 4 kilograms?
    10·2 answers
  • Solve the following system of equations algebraically:<br> x2 + y2 = 20<br> 2y = x
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!