Answer:
x = -1/3
Step-by-step explanation:
We have,
sin(x + 7) = cos(4x + 8)
We need to find the value of x.
We know that,
sin(90-x) = cosx
So,
sin(90-(x + 7)) = cos(4x + 8)
cos(x+7) = cos(4x + 8)
i.e.
(X+7) = (4x+8)
7-8 = 4x-x
-1 = 3x
x = -1/3
Answer:
Part 1) Greta's right, the triangle is incorrect.
Part 2) 
Part 3) The height of the tree is
, Trey’s house is not at risk
Step-by-step explanation:
Part 1) we know that
In the right triangle of the figure


Compare

therefore
The triangle is not correct
Because
The side adjacent to the 30 degree angle should be
and the side opposite the 30 degree angle should be 
Part 2)
Let
x--------> the distance from the airplane to the SCCA (hypotenuse of the right triangle)
we know that



Part 3)
Let
x--------> the height of the tree
we know that



therefore
Trey’s house is not at risk
Answer:
meaning the answer isnt there
Step-by-step explanation:
wait what is it i needddd helllpppp
To find how many sixth graders there are we need to find out how many students there are in 1/5 in the school. Divide 200 by 2 to find 1/5 of the school.
Since 3/5 of the school is 6th graders we multiply 100 by 3 to find that there are 300 students in the 6th grade.