Week 11 in Precalc 11

This week in math we learned how to graph quadratic inequalities in two variables. Some basic information to know first is what the signs mean, e.g. < or > means there it will be a broken line when graphed (or dotted line). ≤ or ≥ means it will be a solid line when graphed. The first step […]

Week 10 in Precalc 11

This week in math we learned how to solve quadratic inequalities using a sign chart. To recall, in previous years we had learned how to solve linear inequalities and how to show those on a number line. For example: 2x-3>11 2x>14 x>7 (all numbers greater than 7) On a number line, we’d show that all […]

Week 9 in Precalc 11

This week in math we learned how to convert quadratic functions into general form, factored form, and standard form from other forms. General form is y=a+bx+c, where c is the y-intercept. Factored form is y=(x-x1)(x-x2), where x1 and x2 are the x-intercepts. Standard form is y=a+q, where a is the stretch or compression of the […]

Week 8 in Precalc 11

This week in math we learned how to determine the properties of a quadratic function. On a graph, a quadratic function looks like a U or upside down U, it’s possible it could be a V as well. This is called a parabola shape, which means it’s symmetrical. The information we want to find out […]

Week 7 in Precalc 11

This week in math we learned about discriminants and how to determine the nature of a root. The discriminant equation is -4ac, as taken from the part of the quadratic formula under the root sign. There is some important vocabulary to know when determining the nature of a root. Distinct roots: two solutions, positive number, […]

Neuron Communication

Neurons are cells that transmit information. There are three different types of neuron structures, a motor neuron, sensory neuron, and interneuron. The structure of a neuron includes the cell body, which is the cells life support center. Dendrites, which conduct messages towards the cell body. The axon, which conducts messages away from the cell body. […]

Week 6 in Precalc 11

This week in math we learned how to solve quadratic equations using the zero product law. A quadratic equation is one that has two answers. A linear equation has one answer and a cubic equation has three. The zero product law is that if two numbers that are multiplied by each other equal zero, then […]

Week 5 in Precalc 11

This week in math we learned how to factor polynomial expressions, specifically ‘ugly’ ones using the ‘box method’. A helpful phrase to figure out if a polynomial expression is ugly or not is CDPEU; Can Divers Pee Easily Underwater. What each of these letter actual stand for mathematically are: common difference, difference of squares, pattern, […]

Week 4 in Precalc 11

This week in math we learned how to add and subtract like radicals. This means that if there are like radicals in an equation, you can simplify their coefficients. In order to simplify their coefficients, you add or subtract. It is a very simple concept once you understand it! Here is an example: 3+2-6 = […]

Week 3 – Precalc 11

This week in math we learned about absolute values. In simple terms, an absolute value is the distance a number is from 0. The official definition is: the absolute value of a real number is defined as the principal square root of the square of a number. Any number that comes out of absolute value […]