Seven times w is at least 21

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

Sorry guys but as you have a small brain

Asif spent $745.10 on 13 new file cabinets for his office. small file cabinets cost $43.50 and large file cabinets cost $65.95. write and solve a system of equations to find the number of small cabinets and large cabinets he purchased. determine if each statement is true or false. 1. he purchased 5 small cabinets. true or false 2. he purchased 7 large cabinets. true or false 3. he spent $527.60 on large cabinets. true or false