[6.02] Fun Land theme park has a total of 80 males and females who are employed at the park. If the number of males is 20 more than twice the number of females, how many males are employed at the park?

80

60

30

20
can any one can help me

Question

[6.02] Fun Land theme park has a total of 80 males and females who are employed at the park. If the number of males is 20 more than twice the number of females, how many males are employed at the park?

 80

 60

 30

 20
can any one can help me

anonymous · Answer

Is it 80

jim_thompson5910 · Answer

let m = # of males and f = # of females

jim_thompson5910 · Answer

Fun Land theme park has a total of 80 males and females 

which means

m + f = 80

solve for f to get f = 80 - m

jim_thompson5910 · Answer

If the number of males is 20 more than twice the number of females

tells us that

m = 2f + 20

jim_thompson5910 · Answer

now plug in f = 80 - m to get

m = 2f + 20

m = 2(80 - m) + 20

m = 160 - 2m + 20

jim_thompson5910 · Answer

I'll let you finish up

anonymous · Answer

i will =138 loli don't know how to solve it :( thanks for helping me

jim_thompson5910 · Answer

m = 160 - 2m + 20

m = 180 - 2m

m+2m = 180

3m = 180

m = 180/3

m = 60

anonymous · Answer

i see now

anonymous · Answer

can you help on this. [6.03] What is the value of the y variable in the solution to the following system of equations?
3x - 6y = 12
-2x + 3y = 6

 -14

 24

 14

 -24

jim_thompson5910 · Answer

double everything in equation 2 to get -4x+6y = 12


now add the equations to get

3x - 6y = 12 
-4x+6y = 12
-------------
-x + 0y = 24

-x = 24

so x = ???

Note: this is NOT the answer since you need to find y, not x

anonymous · Answer

Do i x times 24 how do i solve

jim_thompson5910 · Answer

if -x = 24, then x = -24

jim_thompson5910 · Answer

now use this to find y

anonymous · Answer

x=1

jim_thompson5910 · Answer

-2x + 3y = 6

-2(-24) + 3y = 6

48 + 3y = 6

solve for y

anonymous · Answer

so 48 + 3y =6 
           -3    -3 
48 = 3
48   48 
right

jim_thompson5910 · Answer

48 + 3y = 6

48 + 3y-48 = 6-48

3y = -42

y = ???

anonymous · Answer

Y= -14

jim_thompson5910 · Answer

yep

anonymous · Answer

thank you so much

jim_thompson5910 · Answer

you're welcome

anonymous · Answer

want to help on this two [6.06] Which point lies in the solution set for the following system of inequalities?
y > x + 4
y > -2x + 2

 (-4, 0)

 (-3, 2)

 (2, -1)

 (0, 6)

jim_thompson5910 · Answer

plug each point into both inequalities and see which point makes them both true

jim_thompson5910 · Answer

the point that makes both true is a solution

anonymous · Answer

so how do i sit it up

jim_thompson5910 · Answer

for example

y > x + 4

0 > -4 + 4 .... plug in (-4,0)

0 > 0... that's false, so choice A is out

anonymous · Answer

can you give me a example so we can both solve?

jim_thompson5910 · Answer

try out choice B and show me what you get

anonymous · Answer

(-3, 2) y<-3+2 i need help now

jim_thompson5910 · Answer

y > x + 4

y > -3 + 4 ... plug in x = -3

2 > -3 + 4 ... plug in y = 2

keep going

anonymous · Answer

how you got 4 did i do something wrong??

jim_thompson5910 · Answer

the 4 is part of the first inequality

anonymous · Answer

oh ok

anonymous · Answer

I am lost now

jim_thompson5910 · Answer

you basically start with y > x+4 then plug in (-3,2)

anonymous · Answer

ok so what is next

jim_thompson5910 · Answer

simplify

anonymous · Answer

so simplify the y>x+4 then plug in -3 2

jim_thompson5910 · Answer

no, plug it in first, then simplify

anonymous · Answer

oh ok so it will be like this -3y+4 right???

jim_thompson5910 · Answer

you just simplify this

2 > -3 + 4

anonymous · Answer

oh ok sorry

anonymous · Answer

so = 9?

jim_thompson5910 · Answer

2 > -3 + 4

2 > 1

is that true? or false?

anonymous · Answer

False

jim_thompson5910 · Answer

2 > 1 is true since 2 is indeed larger than 1

anonymous · Answer

oh