4(3/2y+2)+3y=26
6y+8+3y=26
add the y's together
9y+8=26
subtract 8 on both sides
9y=18
divide by 9 on both sides
y=2
(then substitute 2 for y)
4x+3(2)=26
4x+6=26
subtract 6 on both sides
4x=20
divide by 4 on both sides
x=5
Amplitude is 4
I don’t know the cos function, sorry :(
So for this you got to remember to do PEMDAS. The answer I got was C
Answer:
D = 18 miles
Step-by-step explanation:
The coordinate of a library = (4,3)
The coordinate of the school = (-5,3)
We need to find the distance between the library and the school. We can use the distance formula i.e.

As the distance between each unit represents 2 miles. It means the distance is 2(9) = 18 miles
So, the correct option is (c).