5b
4a - 5b = 74a +5b = 17From the first equation:4a = 7 + 5bsubstitute this value in the second equation:7 + 5b + 5b = 177 + 10b = 1710b = 10b = 1Now,solve for a :4a - 5(1) = 74a = 7 + 54a = 12a = 3
Area: 15ab Perimeter: 2(3a+5b) or as 6a+10b
If one vector is a multiple of another vector - that is to say, the coefficients of its components are in the same ratio, then the two vectors are parallel. That is raher a mouthful so here is an example to help illustrate it:Suppose a and b are vectors.Then the veccors 3a + 5b and 6a + 10b are parallel since the second of these is simply two times the first: 6a is twice 3a and 10b is twice 5b.
(ab/b) / (4a/5b) =(ab / b) * (5b / 4a) = (5ab2 / 4ab)= 5 / (4b)
2c
3
-3-5b/7 = -4 Multiply all terms by 7: -21-5b = -28 Add 21 to both sides: -5b = -7 Divide both sides by -5 remembering that a -/- becomes a + Solution: y = 7/5 = 1.4
5b + 5b = 2 x 5b
10b
The GCF is 5b.
It is: (10b+7)(10b-7)