Answer:
c
Step-by-step explanation:
when 2 lines are perpendicular, the product of their gradients will give you -1 thus the gradient of the equation is
2 x m = -1
m = -1/2
and since it will pass thru point (-3, 7)
thus it will results in (x+3) and (y-7)
285%
is the answer i think
Answer:
Step-by-step explanation:
2x+6+2x+6+2x+6=180
why, bc they all have equal sides
6x+18=180
6x=162
x=27
Answer:
2
Step-by-step explanation:
as H=20 and W=10
So H=constant.(W)
H=2(10)
H=20
So constant is 2
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
