What is the formula to find the axis of symmetry?

Use the values of the coefficients to write the equation of axis of symmetry. The graph of a quadratic equation in the form x=ay2+by+c has as its axis of symmetry the line y=−b2a . So, the equation of the axis of symmetry of the given parabola is y=−42(1) or y=−2 .

How do you find the ABC ratio?

To check if the ratio a: b and c: d is proportional.

1. Multiply the first term with the last term: a x d.
2. Multiply the second term with the third term: b x c.
3. If the product of extreme terms is equal to the product of mean terms, then the ratios are proportional: a x d = b x c.

How do you find the value of an expression?

To evaluate an algebraic expression means to find the value of the expression when the variable is replaced by a given number. To evaluate an expression, we substitute the given number for the variable in the expression and then simplify the expression using the order of operations.

What is the axis of symmetry example?

The two sides of a graph on either side of the axis of symmetry look like mirror images of each other. Example: This is a graph of the parabola y = x2 – 4x + 2 together with its axis of symmetry x = 2. The axis of symmetry is the red vertical line.

What is the value of n factorial or N !?

So, n factorial is the product of the first n natural numbers and is represented as n! For example, 4 factorial, that is, 4! can be written as: 4! = 4×3×2×1 4 × 3 × 2 × 1 = 24.

How do you solve a ratio problem?

How to solve a ratio problem

1. Add together the parts of the ratio to find the total number of shares.
2. Divide the total amount by the total number of shares.
3. Multiply by the number of shares required.

How do you write expression?

To write an expression, we often have to interpret a written phrase. For example, the phrase “6 added to some number” can be written as the expression x + 6, where the variable x represents the unknown number.