Classify a triangle with vertices a(1, 1), b(4, 7), and c(7, 1) as one of the following.
a. scalene
b. isosceles
c. equilateral
d. none of the above

Aquantity with an initial value of 3900 decays exponentially at a rate of 35% every hour. what is the value of the quantity after 0.5 days, to the nearest hundredth?

What is the value of x in the equation 1.5x+4-3=4.5(x-2)?

Sally deposited money into a savings account paying 4% simple interest per year.the first year,she earned $75 in interest.how much interest will she earn during the following year?