Answer:
new signs are needed.
Step-by-step explanation:
Given: A 
-kilometer section of a highway is designated as a scenic byway. New signs will be placed at the beginning and end of this section and at every 
Km in between.
To find: How many new signs are needed?
Solution:
We have,
A -kilometer section of a highway is designated as a scenic byway.
New signs will be placed at the beginning and end of this section and at every Km in between.
So, there are 
signs placed, one at the beginning and one at the end.
Now, in between these signs there will be 
signs.
Hence, the total new signs that are needed is 
.
6x-5y=0
4x-5y=-10 |*(-1)
6x-5y=0 |
-4x+5y=10| +
2x=10
x=5
6*5-5y=0
30-5y=0
30=5y
y =6
The slope is -3/5.
The equation is in slope intercept form,
y= mx + b, where m is the slope.
Step-by-step explanation:
the expected value is calculated by multiplying each of the possible outcomes by their probability, and then summing up all these results.
tossing a coin 2 times gives us 4 possible different outcomes (all with the same probability of 0.25) :
head - tail
head - head
tail - head
tail - tail
to have exactly one head is 2 out of these 4 possible outcomes, and the probability is 0.5.
everything else is also 2 out of these 4 possible outcomes, and the probability for that is therefore 0.5 too.
the expected value (from your point of view) is
9×0.5 - 15×0.5 = -$3.00
