Question

A university took a phone sample from 3421 students about tuition and found that 2004 of those students believed that tuition was too high. What is a good prediction of how many students think tuition is too high if there are about 20,000 students at the university?

A. 11,616 students
B. 11,516 students
C. 11,716 students
D. 11,816 students

Answer 1

that is proportional, so...
3421 -> 2004
20000 -> x

just solve the proportion and find x

Answer 2

ok @M4thM1nd

Answer 3

can u explain im blonde if u know what i mean @M4thM1nd

Answer 4

Of course i can, and the color of your hair does not have any relationship with your intelligence :) btw i'm also blonde

Answer 5

lol ok well im dumb then

Answer 6

x = 17105000/501

Answer 7

If something is proportional then there exists a constant C such that, in this case:
C = 2004/3421, ok?
So... this C values must also be equal here:
C = x/20,000

Answer 8

??

Answer 9

is it right??

Answer 10

No, that is not the correct answer.

Answer 11

aww

Answer 12

C = 2004/3421, and C = x/20,000, so...
2004/3421 = x/20000
x = 2004*20000/3421 = ...?

Answer 13

UGH im soo stupid ok so 2004*20000=40080000

Answer 14

Calculating Multipliers :

1.2 Calculate multipliers for the two fractions


Denote the Least Common Multiple by L.C.M
Denote the Left Multiplier by Left_M
Denote the Right Multiplier by Right_M
Denote the Left Deniminator by L_Deno
Denote the Right Multiplier by R_Deno

Left_M = L.C.M / L_Deno = 5000

Right_M = L.C.M / R_Deno = 501


Making Equivalent Fractions :

1.3 Rewrite the two fractions into equivalent fractions

Two fractions are called equivalent if they have the same numeric value.

For example : 1/2 and 2/4 are equivalent, y/(y+1)2 and (y2+y)/(y+1)3 are equivalent as well.

To calculate equivalent fraction , multiply the Numerator of each fraction, by its respective Multiplier.

L. Mult. • L. Num. 3421 • 5000
—————————————————— = ———————————
L.C.M 10020000

R. Mult. • R. Num. x • 501
—————————————————— = ————————
L.C.M 10020000
Adding fractions that have a common denominator :

1.4 Adding up the two equivalent fractions
Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

3421 • 5000 - (x • 501) 17105000 - 501x
——————————————————————— = ———————————————
10020000 10020000
Equation at the end of step 1 :

17105000 - 501x
——————————————— = 0
10020000
Step 2 :

17105000-501x
Solve ————————————— = 0
10020000
When a fraction equals zero :

2.1 When a fraction equals zero ...
Where a fraction equals zero, its nominator, the part which is above the fraction line, must equal zero.

Now,to get rid of the denominator, Tiger multiplys both sides of the equation by the denominator.

Here's how:

17105000-501x
————————————— • 10020000 = 0 • 10020000
10020000
Now, on the left hand side, the 10020000 cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :
17105000-501x = 0

Solving a Single Variable Equation :

2.2 Solve : -501x+17105000 = 0

Subtract 17105000 from both sides of the equation :
-501x = -17105000
Multiply both sides of the equation by (-1) : 501x = 17105000


Divide both sides of the equation by 501:
x = 17105000/501
One solution was found :

x = 17105000/501

Answer 15

didnt i do it right

Answer 16

LOL there are a lot of interrogation marks in your message. i don't understand what you did

Answer 17

and yes, 2004*20000=40080000

Answer 18

it was a glitch or something lol

Answer 19

now x = 40080000/3421

Answer 20

brb

Answer 21

ok

Answer 22

@Conqueror

Answer 23

@King.Void.

Answer 24

@e.mccormick

Answer 25

@Luigi0210

Answer 26

i'm back

Answer 27

ok

Answer 28

do you understand the question now?

Answer 29

no not realy

Answer 30

i think its C though

Answer 31

Yes it's C

Answer 32

realy wow

Answer 33

From 3421 students, 2004 believe tuition is high, so now,
from 20,000 students, x believe tuition is high, so:
2004/3421 = x/20000
x = 11716

Answer 34

:)

Answer 35

A candidate took a phone poll of 110 people. Of the 110 people polled, 87 said they would vote for the other person. There are 9570 people in the district. About how many people are going to vote for the other candidate?

A. 7400 people
B. 7569 people
C. 7069 people
D. 7900 people

Answer 36

@M4thM1nd help me;]

Answer 37

Same way, that is a proportion,
C = 87/110, but C = x/9570
so...
87/110 = x/9570

Answer 38

i think A ??

Answer 39

@SolomonZelman

Answer 40

No...
87/110 = x/9570
x = 87*9570/110 = 832590/110

Answer 41

ohhh so d

Answer 42

??

Answer 43

@M4thM1nd i sent it 2 u