exam
Maths Puzzle
Numerical Ability
a.) Addition: 3x+7y=4
x-2y=-2
b.) Substitution: 5x-5y=-5
y=2x+0
c.) Add or Substitute: -4x-4y=-33
y=x+9
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exam Other Question
A roof rises 9.75ft over a horizontal distance of 17.24ft. What is the slope of the roof to the nearest hundreth?
Please help to solve this problem
1. Calculate
a)the mass of salt in 100 kg of 30% salt solution , by mass
b)the volume of alcohol in 1500L of a 40% alcohol solution, by volume
c) the volume of antifreeze