Answer:
He will earn $180 equation: M= money h = hours m = h15
Step-by-step explanation:
15 dollars times however many hours is equal to the money he earns, in this case 15 x 12 = 180
Answer:
x = - 5, x = 3
Step-by-step explanation:
To find the x- intercepts equate f(x) to zero, that is
x² + 2x - 15 = 0 ← in standard form
Consider the factors of the constant term ( - 15) which sum to give the coefficient of the x- term ( + 2)
The factors are + 5 and - 3, since
5 × - 3 = - 15 and 5 - 3 = + 2, hence
(x + 5)(x - 3) = 0 ← in factored form
Equate each factor to zero and solve for x
x + 5 = 0 ⇒ x = - 5 ⇒ (- 5, 0 ) ← x- intercept
x - 3 = 0 ⇒ x = 3 ⇒ (3, 0 ) ← x- intercept
Answer:
E(M) = 23/3
Var(M) = 53/9.
Step-by-step explanation:
There are three possible values for M: 4, 6, and 10.
.
That's six unique combinations in total. If the balls are drawn randomly, the probability for getting each combination shall be equal. That is:
.
Consider the formula for the expected value of a discrete random variable:
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Formula for the variance of a discrete random variable (note that this formula can take many other forms):
.
Answer: 7
Step-by-step explanation:
First, do 221 divided by 13 to get how many dollars per hour which is 17 and then do 119 divided by 17 to get the amount of hours.