Question

(50 x 2) + (60 x 4)

1000-(5 x 50) + (3 x 150)

3. Vien bought 6 burgers for Php 35.75 each, 6 large fries for Php 32.00 each, and 6 large drink for 21.75 each. write a numerical expression to represent the situation and find the tota cost.

4. The price of a laptop is Php 15 000. The store manager gives a discount of Php 1000. Vien and her
sister bought 3 laptops and then share the cost with her sister. Find the price paid by each sister.

Answer 1

Answer:

Let cost of burger = b, cost of shake = s 

and cost of fries = f

Now, 3b+7s+f=120      ...(1)

And 4b+10s+f=164.50   ...(2)

Subtract the two equations we get 

b+3s=44.5

∴b=44.5−3s     ...(3)

Now, 3b+7s+f=120

or 2b+b+7s+f=120

2(44.5−3s)+b+7s+f=120     ....from (3)

89−6s+b+7s+f=120

∴b+s+f=31

Thus, cost of one burger, one shake and one fries is Rs. 31.