Stephanie has a total of 27 nickels and dimes. The total value of the coins is $1.95. Which system of equations can be used to find the number of nickels(n), and the number of dimes(d), that Stephanie has? A. n+d=27
0.05n+0.10d=1.95
B. n+d=27
5n+10d=1.95
C. n+d=27
0.5n+0.10d=1.95
D. n+d=27
0.15(n+d)=1.95

Can someone me i’m confused. will give brainliest and a whole bunch of points

I've been working on this for a few days and i just don't understand, it's due in a few hours. you. the direction of a vector is defined as the angle of the vector in relation to a horizontal line. as a standard, this angle is measured counterclockwise from the positive x-axis. the direction or angle of v in the diagram is α. part a: how can you use trigonometric ratios to calculate the direction α of a general vector v = < x, y> similar to the diagram? part b suppose that vector v lies in quadrant ii, quadrant iii, or quadrant iv. how can you use trigonometric ratios to calculate the direction (i.e., angle) of the vector in each of these quadrants with respect to the positive x-axis? the angle between the vector and the positive x-axis will be greater than 90 degrees in each case. part c now try a numerical problem. what is the direction of the vector w = < -1, 6 > ?

What are two numbers that have a sum of 15