exam
Maths Puzzle
Numerical Ability
Solve the system by addition
4x+8y=-1
8x-4y=-7
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exam Other Question
I would like to know how to solve these equations in its simplest form
1. 3/8(16x-8)+2/3(15y+12)=
this is as far as i have gotten
128x-8+75y+12
128/8
2. 1.13(2.4x-6)-8.2(2x-7.7) i did not know how to start this problem
A ball is thrown upward from the roof of a building 100 m tal with an initial velocity of 20 m/s. When will the ball reach a height of 80 m?