0
b = 0.2 x 10a = 2a
a/(2b) = a/(4a) = 1/4
= 25%
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Can you subtract an odd number from an odd number to get an even number?
Yes. For example, 7 - 3 = 4. You will always get an even number when adding or subtracting an odd and an odd. Let A & B be two odd numbers, so find out if A - B is even or odd. A = 2a +1 & B = 2b + 1 {little a & b are any integers, multiplying by 2 guarantees that 2a is even, then adding 1 will make it odd} A-B = 2a+1 - (2b+1) = 2a + 1 - 2b - 1 = 2a - 2b = 2(a-b). So (a-b) is some integer, but you multiply by 2, so the answer is even. Add A+B = 2a+1 + 2b+1 = 2a + 2b + 2 = 2(a+b+1), so again we are multiplying 2 by some integer, and get an even number.
How do you factor 16a2 4b2?
Assuming the missing sign is "minus" then you have the difference between two squares. This is solved as (x + y)(x - y). In your example x = 4a and y = 2b so the factorisation is (4a + 2b)(4a - 2b) or more completely: (4)(2a + b)(2a - b).
The sum of 2 numbers is 19 and their difference is 1.What are the 2 numbers?
9 and 10 First the main formulas: a+b=19 a-b=1 Find out what one of the variables are. We can choose "a" or "b" from either of the two formulas. Let's choose "a" from the a-b=1 formula. a - b = 1 [formula] a-b (+b) = 1 (+b) [solve for "a" by removing "b"] a = 1+b Plug that "a" into the other formula a+b=19. a + b = 19 (1+b) +b = 19 1 + 2b = 19 1 + 2b - 1 = 19 -1 2b = 18 b = 9 Plug that into our formula solved from before for "a" a = 1 + b a = 1 + (9) a = 10
What is the LCM of 7ab 8a to the power of 3 b to the power of 2 and 10a to the power of 4?
280a4b2
A2b plus 3a2 plus 2b plus 6?
(a2 + 2)(b + 3)
4a - 2b plus 6a - 8b?
10a - 10 b
What is the answer to 2b-6 equals 20?
2b-6=20 2b=26 b=26/2 b=13
What is 9a plus 2b - 8a -3b?
The given terms can be simplified to: a -b
What two digit numbers are equal to seven time the sum of their digits?
10a + b = 7(a + b) 10a + b = 7a + 7b 3a = 6b a = 2b (2,1), (4,2), (6,3), and (8,4) meet these requirements. So the numbers that are solutions are 21, 42, 63, and 84.
What percent of 50 is b?
b/50 = 100*b/50 % = 2b per cent.
B plus B equals?
=2b
What is the aswer -b plus 5b-2b?
-b+5b-2b=2b
10a-5b equals 25 what is b?
10a - 5b = 25 So 5b = 10a - 25 and hence b = 2a - 5
If b equals a plus 40 and 2a plus 2b equals 160. solve for a and b?
2a + 2b = 160 But b = a + 40 so 2a + 2(a + 40) = 160 ie 2a + 2a + 80 = 160 or 4a = 80 ie a = 20 Then b = a + 40 gives b = 20 + 40 = 60 Solution: a = 20, b = 60
A 2b a b 2a b 2a?
a-^2a-b^-a-b
A-b plus a-b plus 2b plus 2a?
a-b+a-b+2b+a = 4a
Rearrange a equals 2b - c to make b the subject?
a = 2b - c a + c = 2b (a+c)/2 = b b = (a+c)/2
