I NEED HELP ASAP In the diagram, ACD is a straight line, ABC = 62°, ACB = 68°,BC = 6 cm And CD = 7.5 cm. Calculate
(a) AC
(b) The area of the Triangle ABD

For the given quadratic equation convert into vertex form, find the vertex and find the value for x=6 y=-2x^2+2x+2

How many zeros does the function f(x)=4x3-x2+1 have

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil