A. Collin has been working very hard studying for an exam. He wants no less than 90 percent. His teacher said there will be 21 questions on the test. How many questions must he answer correctly to reach his goal? b. The day of the exam he got 17 questions correct. Did he reach his goal? What was Collins Grade?

anyone know??

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?

Find the value of x in the diagram below. select the best answer from the choices provided

G. how many different 6-letter arrangements can be formed using the letters in the word absent, if each letter is used only once? a. 6 b. 36 c. 720 d. 46,656