Please help Find area of the isosceles triangle formed by the vertex and the x-intercepts of parabola y=−x2−4x+21.

If myesha works overtime, she gets paid "time and a half" for every hour she works. in other words, for every hour over 40 hours myesha works each week, she gets her hourly pay plus half her hourly pay. what is myesha's pay per hour when she works overtime?

Which equation expression the relationship between the number of boxes b and the number of cans c and the proportion is 48

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cos of 61.6