Solve the system of equations using the linear combination method. {c+d=17c−d=3 enter your answers in the boxes

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm

ruth is 6 years old

step-by-step explanation:

6 + 24 = 30,   so 6/30 = .2  

if you do 1/5 it also equals .2, so that is the answer.

ratio is 2 : 9

the answer is three

13.5 : 3

8+10

step-by-step explanation:

you multiply 4 by 2 and 5 by 2