Please help me solve 26 and 27

no 28

solution

(AB)=100

ABC+CBD=100

4x+2+3x-7=100

7x-5=100

7x=100+5

x=105/7

x=15

(CBD) =3x-7

3(15)-7

45-7

38

Step-by-step explanation:

by using above information

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

7

step-by-step explanation: