See Quadratic Formula and Determinant's/Delta's formula
Number Properties: PEMDAS
Parentheses, Exponents, Multiplication, Division, Addition, & Subtraction

1. Parentheses

There Are No Exponents, Multiplication, Division, Or Addition
2. Subtraction
Answer:
1 5/7
Step-by-step explanation:
I literally just took the test so yeah
There are 12 Nickels, 9 Quarters, and 15 Dimes.
Answer:
y = 0.8425 or y = -0.8425
Step-by-step explanation:
All points in the Cartesian coordinate system have an x and y coordinate, defined by two perpendicular measurements.
If the point is on the unit circle, then the radius of the circle is defined to be 1 unit, and the corresponding right triangle follows the Pythagorean Theorem.

For a unit circle:

Substituting the known value for x, and simplifying...


Subtracting 0.29019769 from both sides to begin to isolate "y"...


Applying the square root property...


So, (to 4 decimal places), the y coordinate could be either 0.8425 or -0.8425.
With only the given information, either result is a valid answer.