Easy
nPr=

here
36P19=



1045843337171591729971200000
93- 30=63 students likes maths or english or both
42+41=83 likes english or math
but I have only 63 students
83-63=20 students likes both
Answer:
Step-by-step explanation:
In the table, they give you an x-value. Use the x-value to solve for y. You will then get a point. Plot the points to find the graph.
y = 1/2x
y = 1/2(0)
y = 0
(0, 0)
y = 1/2x
y = 1/2(2)
y = 1
(2, 1)
y = 1/2x
y = 1/2(-4)
y = -2
(-4, -2)
Answer:
3 hours
Step-by-step explanation:
250 = 50h + 100(4 - h)
250 = 50h + 400 - 100h
250 = -50h + 400
-150 = -50h
h = 3