90
the answer is 90 but the answer i give has to be over 20 characters so i'm typing random things. have a good day:)
Answer:
The solution is the point (-2,-2)
Step-by-step explanation:
we have
----> equation A
----> equation B
Solve the system by substitution
substitute equation A in equation B
Solve for x
Find the value of y
substitute the value of x in the equation A
so
therefore
The solution is the point (-2,-2)
The more observations you make the closer and closer the experimental probability will approach the theoretical probability. In this case the theoretical probability is:
P(HH)=(1/2)(1/2)=1/4
So in 105 trials one would expect to get two heads:
105(1/4)=26.25 times.
To find the answer,we can simply multiply 275 by 2-1/2:
275×2-1/2
=275×(2×2+1)/2
=275×5/2
=1375/2
=678-1/2
Therefore, the answer is 678-1/2.
Hope it helps!
