Zack bought a coat for $69.78. He paid with a $100 bill and received $26.73 in change. How much was the sales tax?

Find the equation of the line that passes through (-4,1) and is parallel to 1/2

Is 4 m greater or less than 400 dm

Find the derivative of f (x) = 4.15cos^x

Which fraction is equal to 0.20%?

The sum of three consecutive odd integers is 21 less than 4 times the largest number. Find the 3 numbers.

jellybeans cost $0.80 per pound. Howard buys 4.5 pound of jellybeans for himself and 1 pound for his friend. What is the total cost of the jellybeans Howard buys. Show work.

Type the equation that shows the pattern among this set of ordered pairs (2,4) (3,8) (4,12) (5,16)

What is the answer to this6 (2+4y) =

find the values os a and b so that the polynomial x3+10x2+ax+b is exactly divisible by (x-1) and (x+2)

You do 4 loads of laundry each week at a launderette where each load costs$1.25. You could buy a washing machine that costs $400. Washing 4 loads at home will cost about $1 per week for electricity.