Answer:
The probability of select randomly a red or a blue marble is
Step-by-step explanation:
The probability of an event is the ratio of the number of ways it can happen, to the total number of possible cases.
Select randomly a red or a blue marble are mutually exclusive events because they cannot occur at the same time. When two events, A and B, are mutually exclusive, the probability that A or B will occur is the sum of the probability of each event.
We know from the information given that
- There are 46 red marbles, 59 white marbles and 49 blue marbles
We can use this information to calculate the probability of select randomly a red marble and also the probability to select randomly a blue marble
Now we can calculate the probability that we select a red or a blue marble
Answer:
roses cost 5 geraniums cost 10
Step-by-step explanation:
rose=x
geraniums=y
11x+14y=195
14x+7y=140
Multiply the top by -7 and the bottom by 14 so geraniums(y) cancels out and you can find rose(x)
-77x-98y=-1365
196x+98y=1960 y cancels out
119x=595
------ -----
119 119
rose(x)=5 insert 5 for x to find y (geraniumns)
11(5)+14y=195
55+14y=195
-55
14y=140
----- ----- geraniums(y)=10
14 14
Add 1 multiple by 2 term is 2 answer is 2
Answer: 4n^2
Step-by-step explanation: -3n^2 - (-7n^2) = -3n^2 + 7n^2= 4n^2. When adding and subtracting the exponents stay the same only the coefficients are subtracted or added