Answer: 1/729
.........................
So the total number of marbles is 18(6+4+3+5) right?
So we have 4 green and 3 blue marbles.
So together we have 7 marbles that we want to get right?
Now 7/18 is the chance that this will happen.
So ans:7/18
<span>B.
First look to simplify:
(40x^2 + 22x - 6) = (2)(20x^2 + 11x - 3)
now factor knowing one side must be (4x + 3)
(2)(20x^2 + 11x - 3) =
(2)(4x + 3)("SomethingX" + "something")
4x times SomethingX must = 20x^2
Something must be 5 (4x * 5x = 20x^2)
now we know:
(2)(20x^2 + 11x - 3) =
(2)(4x + 3)(5X + "something")
3 times "something" must equal -3
that must be -1... therefore:
(2)(20x^2 + 11x - 3) =
(2)(4x + 3)(5X + -3)
The fact that this works and the others don't means the answer is B.</span>
Given
Miranda started a car-washing business
She spent $75 to purchase supplies to get started and she uses about $0.50 worth of supplies per car washed.
Miranda charges $9 for each car washed
Find out the minimum number of cars Miranda will need to wash to make a profit.
To proof
As given
let c represent the number of cars.
She spent to purchase supplies to get started = $ 75
she uses worth of supplies per car washed = $ 0.50
Miranda charges for each car washed = $ 9
than the inequality be
i.e the minimum number of cars Miranda will need to wash to make a profit is 9 .
Hence proved
