Asked in Algebra
Algebra equation-20a divided by 4a equals?
-5 is the answer -20a divided by 4a is -5. If we times 4a by a positive number, we would get a positive number, so we have to times it by a negative number. The number can't have an a at the end as this would mean when we times it by 4a we would end up with a2 -5 x 4 = -20 then we add on the a = -20a ...
Asked in Math and Arithmetic, Algebra, Geometry
In a triangle abc angle b is 4 times angle a and angle c is 9 degrees less than 5 times angle a the size of a is?
a = a b = 4a c = 5a-9 a+4a+5a-9 = 180 10a = 189 a = 18.9 degrees