How do i go about calculating 40% of 80

Is (5,3) a solution to this system of equation X+y=8 17x+17y=8

Solve - 3 (x - 1) + 8 (x - 3) = 6x + 7 - 5x

How can 0.5 turn into a fraction

What are the missing terms? __,4,__,__,-11

Three is added to our number and then the sum is multiplied by 4 the result is 16 what's the number

Find the equation of the tangent to the curve at x=3 for parametric equations x = t + 1/t y = t^2 + 1 / (t^2) when t is greater than 0

Carlos has red 45% of his books if his books has for 180 pages how many pages has he read

Simplified form of m^7 (m^2) m^-9

Kevin wants to buy his mom a $35 necklace if the necklace is 40% off how much will Kevin have to pay

Five years ago, a computer that worked half as fast as a current computer cost twice as much money. The current computer's speed to price ratio is what percent of the older computer's speed to price ratio?