Giuliana has 22 quarters and dollar coins worth a total of $10.75.
which equation can be used to find d, the number of dollar coins giuliana has?

Given:
22 quarters and dollar coins worth 10.75

quarters = 0.25 
dollar = 1.00

q + d = 22
0.25q + d = 10.75

q = 22 - d
0.25(22-d) + d = 10.75 

5.5 - 0.25d + d = 10.75
0.75d = 10.75 - 5.5
0.75d = 5.25
d = 5.25/0.75
d = 7

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )