Answer:
The distance between both positions are 4.5
Step-by-step explanation:
we are given
Two similar artifacts are found—one at position (1,4) and the other at (5,2)
First point is (1,4)
x1=1
y1=4
Second point is (5,2)
x2=5
y2=2
now, we can use distance formula
now, we can plug values
Maybe from the equation of a line from y=mx+c
Where c ( intercept) is -12
220=A+S (adult plus student)
s=220-a
2.50a+1.50s=465
1.50s=-2.50a+465
s=-1.67a+310
then set those equal to each other
220-a=-1.67a+310
220=-.67a+310
-90=-.67a
.67a=90
a=60
then put a back into the first equation
220=S+A
220=s+60
s=160
a=60, s=160
Answer:
Step-by-step explanation:
8a+2b-4 factors into
2(4a+b-2)
Probability Trees - See linked image
A good visual method for this is a probability tree.
Each set of branches represents the probabilities of on coin being removed, the second set is out of 9 as the first coin is taken and not replaced.
Multiply along the lines to work out the probability of each of the combinations.
*Even though only 'Dime Dime' is needed, it is best to do all of them as this way you are able to get all marks in an exam; you can also add up all the final values as a check to see if you are right.