In a quadrilateral abcd, the angles a, b and c are in the ratio 1: 3: 7.find (a) angle d (b) angle c given that the sum of angle a, b,c is 187°

Asystem of equation is shown below 6x - 2y equals 3 . and 5x + 3y equals 4. would you solve by substitution or elimination? and why

What is the logarithmic function modeled by the following table? x f(x) 9 2 27 3 81 4

Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.