A road has a gradient of 1/15 for 90 m. Then there is a horizontal section 130 m long.
The final section has a gradient of 1/25 for 200 m.
a. Find the total height gained from start to finish.
b. What is the average gradient from start to finish?

I did the first part of the question and got 14 m which is right but then I don't understand the second part (b.) Could someone explain it to me, please?

1.) 2x + y = 3 2.) x - 2y = -1 if equation 1 is multiplied by 2 and then the equations are added, the result is a.3x = 2 b.3x = 5 c.5x = 5

Martin likes to make flower bouquets that have 3 daffodils and 4 tulips per vase. a daffodil has a mass of d grams, a tulip has a mass of t grams, and the vase has a mass of u grams. the expression 5(3d + 4t + v) describes the mass of 5 bouquets. match each amount in the situation with the expression that represents it. situation expression number of bouquets mass of one bouquet mass of the tulips in one bouquet 4t mass of the daffodils in one bouquet 3d + 4t + v

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !