To prove that:
LHS =
Using basic trigonometric identity,
Using trigonometric identity:
= 1
= RHS
LHS = RHS
Hence proved.
Answer:
Step-by-step explanation:
Ray hired sun and peter to help him move.
Let h represent the number of hours that each of them worked.
Let y represent Ray's total cost for hiring Sun and Peter for h hours.
Sun charged a $20 flat fee and $30 per hour. The total amount that Sun charges would be
20 + 30h
Peter charged $25 per hour. The total amount that Peter charges would be
25h
An expression for Ray's total cost if Sun and Peter each work h hours would be
y = 20 + 30h + 25h
y = 20 + 55h
Answer: =
Step-by-step explanation:
The formula for calculating equation of line when two points are given is :
=
= 2
= -9
= -7
Substituting the values into the equation , we have
=
=
cross multiplying , we have
=
=
=
=
The answer is the number 7