Eric sells shirts. it costs him $100 to buy all the shirts and $10, total, to print designs on them. eric sells each shirt for $4. so far he has sold 20 shirts. he uses the equation y = 4x - 110 to calculate his profit.

what is the constant in eric’s equation?
a) 4
b) -10
c) 20
d) -110

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.

Why is x= 4 a solution to the proportion 14/x 56/1 6