8.5x + 9x = y
That is because you don't know how many hours they worked, so you can't how much money they made.
If you plugged in 4 hours for the x's you'll do something like this:
8.5 (4) + 9 (4) = y
34 + 36 = y
70 = y
That is how you would do it if you have the number of hours they worked.
Answer:
m = 8.50 x + 9x
Step-by-step explanation:
Hi, to solve this we have to write an expression where:
x : hours worked
m : money earned by Joe and Maggie
Joe makes $8.50 per hour, so if he works x hours he earns $8.50 (x) .
Maggie makes $9 per hour, so if she works x hours she earns $9 (x) .
If they work x number of hours, they both will make:
m = 8.50 x+ 9x
Feel free to ask for more if it´s necessary or if you did not understand something.
-14 + (8/9)
(-126 - 8)/9
= -134/9
It is binomial:
p= 0.75 = 75%
1-p = 0.25 = 25%
N = 10
k=7
"seven successes in 10 trials"
(10 choose 7) (0.75)^7 ( 0.25)^3 =
(10*9*8 / 3*2) * (0.75)^7 ( 0.25)^3 =
(5*3*8) (0.75)^7 ( 0.25)^3
120 (0.75)^7 ( 0.25)^3
= 0.25028228759765625
or just over 25%
An
