Answer: 2a
Step-by-step explanation:
18a: 1,2,3,6,9,18 then there's A
20ab: 1,2,4,5,10,20 then there's A and B
6ab: 1,2,3,6 then there's A and B
All have a 2 and an A in common so it's 2a
So basically the question wants to confuse by saying “6 months” which is half a year, right? Do everything normally until 4yrs and then write into compound interest formula but with n as 1/2 which is root.
hey
let s note a and b the two numbers
we can write
(1) a = 2b - 2
(2) ab = 40
from (2) we can say for b different from 0 that
a = 40/b
replace it in (1)
40/b=2b-2
so
2(b-1)b = 40
b(b-1) = 20
5 is a trivial solution and as the product of the two solutions is -20 then the second solution is -4 therefore
<=> (b-5)(b+4) = 0
<=> b = 5 or b = -4
so we have
a= 40/b = 8 and b = 5
or
a = 40/b = -10 and b = -4
(8,5) and (-10.-4) are solutions
do not hesitate if you have any question
thanks
All squares are rectangles. All rectangles have four sides. Logic, therefore, tells you that all squares have four sides.
It is dangerous to drive when it is snowing. It is snowing now. Logic tells you that it would be dangerous to drive right now.
All dogs have a good sense of smell. Bailey is a dog. Therefore, deductive reasoning logic tells you that Bailey has a good sense of smell.
All seniors are bad drivers. Mr. Jones is 70 years old and you won't let him drive your car because you think he is an unsafe driver.
When it rains the trees get wet. The trees are wet this morning, so it rained last night.
All trees have trunks. An oak tree is a tree. Therefore, deductive reasoning tells you that the oak tree has a trunk.