Agroup of friends is addressing wedding invitations. casey can address 22 envelopes in one hour, anne can address 46 envelopes in two hours, and paula can address 70 envelopes in three hours. about how long will it take them to address 450 envelopes?

a. 19.57 hours
b. 23.00 hours
c. 7.34 hours
d. 6.59 hours

In a certain pentagon, the interior angles are a,b,c,d,e where a,b,c,d,e are integers strictly less than 180. ("strictly less than 180" means they are "less than and not equal to" 180.) if the median of the interior angles is 61 and there is only one mode, then what are the degree measures of all five angles?

What are the coordinates of the midpoint of ab? ,1/2) /2,-1) ,-3/2) /2,-2)

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.