When two probabilities

Mathematics

1 answer:

Ivenika [448]3 years ago

7 0

Answer: True

Step-by-step explanation: Because if we have two independent events and want to know the probability of their happening at the same time, we multiply the two probabilities together. "Two events happening at the same time" is a compound event. We more often see this as "P(xy)," the probability of x AND y.

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Find the non-extraneous solutions of the square root of the quantity x plus 9 minus 5 equals quantity x plus 4

Sedaia [141]

I"m guessing you mean
$\sqrt{x+9} -5=x+4$
add 5 to both sides
$\sqrt{x+9}=x+9$
square both sides
x+9=x²+18x+81
minus x+9 both sides
0=x²+17x+72
factor
what 2 numbres multiply to get 72 and add to get 17?
8 and 9
0=(x+8)(x+9)
set to zer

0=x+8
x=-8

x+9=0
x=-9

test each

$\sqrt{-8+9} -5=-8+4$
$\sqrt{1} -5=-4$
1-5=-4
-4=-4
true

$\sqrt{-9+9} -5=-9+4$
$\sqrt{0} -5=-5$
-5=-5
true

the solutions are x=-9 and -8

4 0

4 years ago

Read 2 more answers

h(t)=-5t^2+10t+3 is the height of a diver above the water, t seconds after the diver leaves the springboard. How high above the

Kobotan [32]

Answer:

3 units

Step-by-step explanation:

So if we want to know how high the spring board is, this will need to be the time at which the diver is still at the top of the board, in this case t = 0 seconds.

So we will need to find h(0)