Answer:
4
Step-by-step explanation:
Divide botoh sides by 7
x-12=-3
add 12 to both sides
x+12-12=12-3
x+0=9
x=9
Answer:
Step-by-step explanation:
Line CP is a perpendicular bisector to line segment AB
if
two congruent lines are formed when AB is intersected ( bisector forms two equal in measure and congruent parts)
and
a right angle is formed between the line CP and AB ( perpendicular lines form right angles.)
Answer:
An irrational number has a repeating decimal digits that continues on infinitely
Step-by-step explanation:
Answer:
53.57%
Step-by-step explanation:
We have to calculate first the specific number of events that interest us, if at least 3 are girls, they mean that 2 are boys, therefore we must find the combinations of 3 girls of 5 and 2 boys of 3, and multiply that, so :
# of ways to succeed = 5C3 * 3C2 = 5! / (3! * (5-3)!) * 3! / (2! * (3-2)!)
= 10 * 3 = 30
That is, there are 30 favorable cases, now we must calculate the total number of options, which would be the combination of 5 people from the group of 8.
# of random groups of 5 = 8C5 = 8! / (5! * (8-5)!) = 56
That is to say, in total there are 56 ways, the probability would be the quotient of these two numbers like this:
P (3 girls and 2 boys) = 30/56 = 0.5357
Which means that the probability is 53.57%
