Answer: Simple interest= Principal× rate× time/ 100
Amount= Simple interest + Principal
Step-by-step explanation:
Explain it better /$&$&$&$&
Answer:
-5x+9=9
-5x+9-9=9-9
-5x=0
x= 0/5
x= 0
Step-by-step explanation:
The mean is the sum of all numbers divided by the number of numbers. We can set up an equation:

Where 'x' is the next quiz score she need. Solve for 'x'. Multiply 5 to both sides:

Add:

Subtract 322 to both sides:

So her next quiz score needs to be 73 in order to have a mean score of 79 on all her quizzes.
By addition theorem of probability,
P(AUB) = P(A) + P(B) -P(A∩B)
or
P(A or B) = P(A) +P(B) - P(A and B)
P(A or B) = 0.7 + 0.4 - 0.3 = 0.8
Therefore, the probability that randomly selected person likes pizza or burger is 0.8