A parking garage near Paula's house is 4 stories tall. There are 13 open parking spots on the first level. There are 3 more open parking spots on the second level than on the first level, and there are 6 more open parking spots on the third level than on the second level. There are 65 open parking spots on the fourth level. How many open parking spots are there in all?

Ineed asap graph the system of equations 2x+y=5; 14+7y=35

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?

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?