To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.

3a⁸ + 7a⁸ = 10a⁸

The first step to solve a quadratic expression that's not set to zero is to solve the equation so that it is set to zero:

y² + + 5 = 5y - 1
y² + + 5 + 1 = 5y
y² - 5y + 6 = 0
y² - 5y + 6 = 0

Next, factor the quadratic equation:

y² - 5y + 6 = 0
(y - 2)(y - 3) = 0

For this expression to be true, the left side of the expression must equal zero. Therefore, either (y - 2) or (y - 3) must equal zero:

If (y - 2) = 0, y must equal 2
If (y - 3) = 0, y must equal 3

So the solution is that y = 2 or 3

An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.

A line on the coordinate grid can be defined by a slope-intercept equation: y = mx + b. For a given value of x, the value of y can be determined given the slope (m) and y-intercept (b) of the line. The slope of a line is change in y over change in x, \({\Delta y \over \Delta x}\), and the y-intercept is the y-coordinate where the line crosses the vertical y-axis.

The formula for circumference is circle diameter x π. Circle diameter is 2 x radius:

c = πd
c = π(2 * r)
c = π(2 * 16)
c = 32π