Answer:
b = 
Step-by-step explanation:
The standard form of the sine is
y = asin(bx + c) + d
where | a | is the amplitude, period = 
c is the phase shift and d the vertical shift
Here period = 15, thus
= 15 ( multiply both sides by b )
15b = 2π ( divide both sides by 15 )
b = 
Answer:
-142/9
Step-by-step explanation:

Answer: C
Step-by-step explanation:
Simplify to 4x^2 + 12x + 5 = 0 so that all the terms are on one side.
Do a part of the quadratic formula to see.
You only need to do the
part. If it is negative, that means there are irrational solutions. If it is positive, it has two solutions. If it is 0, it has 1 solution.

It is positive so it has two solutions.
1. X= 61/8
2. X= 61/9
3. Y= 20/3
Answer:
1
Step-by-step explanation:
When numbers are raised to an exponent/power, it means how many times you are multiplying the number by itself.
Follow BEDMAS order. (Brackets, exponents, division/multiplication, addition/subtraction).
Solve inside the brackets of (8^1)^0 first
(8^1)^0 8^1 is 8. (Any number ^1 is itself).
= 8^0 Any number to the power of 0 is 1.
= 1
You can also follow the exponent rule where: 
(8^1)^0 = 8^(1*0) = 8^0 = 1