Bill and Gwyll are going to the on holiday to the USA
Bill changes 450 pounds from his bank and gets $729
Gwyll changes 500 pounds and gets $780
a) What exchange rate did Bill get from his bank? 1POUND =$?
b) What exchange rate did Gwyll get from his bank 1POUND =$?
Who got the better deal?

Bill

Step-by-step explanation:

1) we need to divide the dollars by the pounds to get the unit rate:

729/450=$1.62/1 pound(this is Bills exchange rate)

780/500= $1.56/1 pound(Gwens exchange rate)

1.62>1.56 so Bill has the better deal

hope this helps

b. 10=9.1+0.2x

step-by-step explanation:

that's it

< xcy ≅ < xby

step-by-step explanation:

in δcax and δbax,

so, δcax ≅ δbax (side-angle-side or sas)

since δcax ≅ δbax, we can conclude < acx ≅ < abx

in δacy and δaby,

so, δacy ≅ δaby (side-angle-side or sas)

since δacy ≅ δaby, we can conclude < acy ≅ < aby

now,

< acy ≅ < aby

=> < acx + < xcy ≅ < abx + < xby

=> < acx + < xcy ≅ < acx + < xby   (since < acx ≅ < abx already proved above)

subtracting < acx from both sides, we get

< acx + < xcy -< acx ≅ < acx + < xby -< acx

cancelling out < acx and -< acx from both sides, we get

< xcy ≅ < xby (proved)