Question

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

Answer 1

i need help i think its 60

Answer 2

lol
Let's pretend there aren't any choices for the moment :)
First step to such problems is to represent the values:
If we let x = number of males employed
How would you represent the number of females?

Answer 3

y?

Answer 4

Hint:

m + f = 80
m = 2f + 20

Answer 5

That approach would make sense, in this setup, as you know that there are ONLY 80 employees in all, you know that if there are x males, the rest must be female, how many are the rest?

:)

Answer 6

m+f=80
males= 20 more than twice the number of females

substitute m=2f+20 into m+f=80

2f+20+f=80

Find the number for females employed and you can find the number of males employed using the m=2f+20 equation.

Answer 7

i have another question....What is the value of the x variable in the solution to the following system of equations?
4x + 3y = 10
4x + 5y = 14

Answer 8

Hint:
2y=4
y=2

Answer 9

It seems easier to get the y value first. Subtract the second equation from the first, you'll get the equation @monokerous has provided.

Answer 10

i got that one can u help with the last one i put

Answer 11

you need to substitute y=2 into either one of your equations to find x.

Answer 12

ok but im still confused
how do u solve it

Answer 13

Well, as mentioned, you substitute y=2 to any of the two equations like so:

4x + 3(2) = 10

Now solve for x :)

Answer 14

o yay i get it because 4+6=10 and 4+10=14 duh

Answer 15

o forgot :(

Answer 16

i think its one right

Answer 17

Isn't it strange that simply removing the x made the equations true? then x can only be... :D

Answer 18

lol, yes, you got it :D

Answer 19

can u help me wif another one

Answer 20

Sure, I'll do what I can ^.^

Answer 21

thanks What is the value of the y variable in the solution to the following system of equations?
13x - 6y = 20
7x + 4y = 18

2

1

-2

-1

Answer 22

Can't guarantee that the answers will look as nice though :)
Are you willing to work with a bit of decimals?

Answer 23

would it be 2 because 13*2=26 - 6=20
and 7*2=14+4=18 so y would equal 1 again

Answer 24

Hang on, let's do this step by step, because I'm a bit confused (sorry :( )
First, multiply the first equation by 2, on both sides
And multiply the second equation by 3, on both sides.

Answer 25

You were right about y=1 though. If you're confident about your solution, then you should be fine :)

Answer 26

ok thanks ill try its just a pretest but im actually trying to get a good grade lol