Help with this problem!!!! X/2-3=9
1 answer:
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Answer:
a
b
c
Step-by-step explanation:
The chance that it will rain is
The chance that it does not rain is
The probability that the bus run late if it rains is
The probability that the bus run late if it does not rain is
Generally the probability that it will rain and the bus will be late is mathematically represented as
=>
=>
Generally the probability that the bus will be late is mathematically represented as
=>
=>
Generally given that the bus ran late, the probability that the bus it was not raining is mathematically represented as
Here
=>
=>
So
=>
<h2>(1, 4)</h2><h2 />
To solve this system by addition, notice that if we add these two equations together, neither one of our variables will cancel out.
In this situation, we need to set things up so that when we do add our two equations together, one of the variables will cancel out.
Notice that we have a 10x in our second equation. if we had a -10x in our first equation, then the x's would cancel out.
To create a -10x, we can multiply the top equation by -2 to get a -10x.
From there, rewriting our equation gives us -10x - 2y = -18.
Now the x's cancel. Just add the equations together
now to get the two-step equation -9y = -36.
Solving from here, <em>y = 4</em>.
Now plug y into either one of the equations
to find that x =1.
So our solution is (1,4).