Half the tuna sandwiches are on white bread .25% of tge ham sandwiches sold were on brown bread .There were 20 more white bread sold yhanbon brown bread

Number of tuna sandwiches is 80

Those in white bread = 1/2*80 =40

Those in brown bread = 0.25 *80 =20

Step-by-step explanation:

Given that 1/2 of the tuna sandwiches are on white bread and 25% of the tuna sandwiches sold are on brown bread then let x to represent the number of tuna sandwiches available.Form expressions as;

0.5 x number of Tuna sandwiches on white bread

0.25 xnumber of Tuna sandwiches on brown bread

Given that 20 more white bread were sold than the brown bread then the expression for this statement will be;

0.5 x - 0.25 x = 20

0.25 x =20

x= 20/0.25 = 80

Number of tuna sandwiches is 80

Those in white bread = 1/2*80 =40

Those in brown bread = 0.25 *80 =20

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.