A hat salesman earns a commission of 30% of all hat sales made. Yesterday he sold 3 hats for $90 each and 4 hats for $50 each. How much did he earn in commission yesterday?

If vectors u, v and w ar linearly indepndnt, will u-v, v-w & u-w also be linearly indpnt? ... ?

Expan and simplify the following expression: 3 (2a + 3) (2a - 1) - 4 (a^2 - 7)

Write an equation of an ellipse in standard form with the center at the origin and a height of 12 units and width of 19 units.

When x = 5, the value of the expression StartFraction 20 Over negative 25 plus x EndFraction-2 (x - 10) is

If anton can carry 4 boxes per trip, how many trips will it take him to move 68 boxes?

if a hospital patient is given 50 milligrams of medicine which leaves the bloodstream at 10% per hour, how many milligram of medicine will remain in the system after 6 hours?

What is 5,000 rounded to

Is the following relation a function? (6,2) (-2,2) (4,1) (-1,1)

Solve the inequality. 1/3a+2<-2

The larger two numbers is 12 more than the smaller number. If the sun of the two numbers is 74, find the two numbers.