To evaluate an expression with variables:

1. Substitute the values for the variables.

2. Identify grouping symbols, beginning with the innermost symbols.

3. Determine and apply the rules of exponents to simplify.

4. Evaluate.

Evaluate the expression using x = –1 and y=3.
(6x4y3)

What is the value of the expression?
–162
–54
162
216

  21.3

step-by-step explanation:

multiplying the given equation by c/sin(25°), we get

  c = 9/sin(25°) ≈ 21.2958 ≈ 21.3

we assume "c" is the length of ab, the side opposite angle c in triangle abc.

true

step-by-step explanation:

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step-by-step explanation:

what is the figure? attach a picture.