Which choice can be used to confirm that a quadrilateral is a parallelogram
a. quadrilateral is a parallelogram if it has two pairs of parallel sides
b. a quadrilateral is a parallelogram a good has two congruent sides and two non-congruent sides
c. a quadrilateral is a parallelogram if it has two adjacent congruent angles
d. quadrilateral is a parallelogram if it has opposite angles that are not congruent

Asquare has a perimeter of sixteen centimeters. what is the length of each of its sides? a. 8 cm c. 9 cm b. 4 cm d. 10 cm select the best answer from the choices

A50% increase followed by 33 1/2% decrease

Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?