Use Cramer's Rule to solve the system of equations:
Look at the image
Dₓ=
Dᵧ=
D=

Given that (x-3) is a factor of f(x)=x^3+ax^2-x-6, find a and hence the number of real roots or the equation f(x)=0

An alien has just landed from the planet, iksnimak. he would like to leam how to add two fractions when thedenominators are the same. write a paragraph that explains to our alien friend, in your own words, the detailsabout how to add the fractions, how to change the result to a mixed number, and how to reduce the fractionpart. use this problem as your example: the two fractions are 5/8 & 7/8

Describe the symmetry of the figure. identify lines of symmetry, if any. find the angle and the order of any rotational symmetry.