When doing inequalities, when would I know when to switch the sign/symbol (by symbols I mean; )

Using the equation y=ax^2+bx+c to represent a parabola on a graph, which statement is true? 1) If b is negative, the parabola opens downward 2) If a is negative, the parabola opens upward 3) If a is positive, the parabola open upward 4) If c is

Frank deposited $100 into an account that earns 4% interest which is compounded 4 times per year how much will frank have in his account in 3 years

Betty is allergic to milk products. She discovers that 40% of the food items available in the school cafeteria contain milk products.

Which number is a prime factor of 210 A. 2 to the 6th power B. 6 to the 2nd power or 6 squared C. 12 to the 6th power. Exponents and Prime factorizations!

Can 10/12 be simplified

Matthew is a salesman and earns commission on merchandise he sells. Last week he sold $7000 in merchandise. How much money does Matthew get in commission? The percent of the commsion is 3%

3x + 2y = 8 x + 2y = 4

A firework is fired vertically into the air at a speed of 100 m/s. The expression - 5t2 + 100t + 40 gives the height of the firework after t seconds. Factor this expression.

Six friends play golf. Their scores are 87,95, 92, 88, 91, and 96. What is the mean, median, and mode of the friends' scores?

X to the 2nd + 8x + 12 equals 0