order of operation
1) --[-3÷3])+20
2) -27+(-12)(10)+4•[-3-16]
3) (-)-13(-26÷[-13])
4) -10+(-2)(13)-7(-2-1)
it would mean the world

What is the value of the discriminant, b2 ? 4ac, for the quadratic equation 0 = x2 ? 4x + 5, and what does it mean about the number of real solutions the equation has?

Find the measurement of angle b in the following triangle

P= price tax is 4% added to the price. which expression shows the total price including tax?