Answer: AB = 12.5, BC = 15
<u>Step-by-step explanation:</u>
Perimeter of ΔBCD = BC + CD + BD. Since it is an isoceles triangle, then BC = CD = BD. So, Perimeter of ΔBCD = 3BC
3BC = 45
<u>÷3   </u>    <u>÷3 </u>
  BC = 15
Perimeter of ΔABC = AB + BC + AC.  Since it is an isosceles triangle with BC as the base, then AB = AC. So, Perimeter of ΔABC = 2AB + BC
2AB + BC = 40
2AB + 15 = 40
<u>          -15</u>  <u> -15 </u>
2AB       = 25
<u>÷2         </u>   <u>÷2  </u>
       AB  = 12.5
 
        
             
        
        
        
Answer:
23+12=
Step-by-step explanation:
 you just need figure it out in your head and see what sounds right
 
        
                    
             
        
        
        
Round 9 3/4 to 10 ft
10 × 4 = 40 ft²
answer is 40ft² estimated
        
             
        
        
        
Answer:
no
Step-by-step explanation:
6x-5x-2x=8-5
-1x=3
-1x/-1=3/-1
x=-3
 
        
             
        
        
        
Answer:
Yes! Our total savings on gas proportional to the number of beverages you purchase.
Step-by-step explanation:
Here, each liter of gas costs $3.
Every beverage you purchase you save $0.20.
So, if you purchase for $9, you will save 3*$0.20  = $0.60
So, this is proportional because when increase in purchase, there is proportional increase in savings.