Share

## A sandwich and a cup of tea cost £2.10. Two sandwiches and a cup of tea cost £3.70. Calculate the cost of a cup of tea. Show you

Question

A sandwich and a cup of tea cost £2.10.

Two sandwiches and a cup of tea cost £3.70.

Calculate the cost of a cup of tea. Show your working.

+

in progress
0

Mathematics
4 weeks
2021-08-19T13:34:35+00:00
2021-08-19T13:34:35+00:00 2 Answers
0 views
0
## Answers ( )

Answer:Let’s make sandwich “s” and tea “t.”

Make an equation with the variables.

a. 1s + 1t = 2.10

b. 2s +1t = 3.70

Then, do 3.70-2.10, to find the cost of a sandwich. It equals 1.60.

Then, do 2.10-1.60 to find the cost of a cup of tea, which is 0.50.

SO: The cost of a cup of tea is £0.50.

The cost of a sandwich is £2.10.

Hope this helps!

Answer:t= 0.50

Step-by-step explanation:

s= sandwich cost

t= tea cost

s+t= 2.10

2s+t = 3.70

Rewrite first equation as s= 2.10- t

Plug it into second equation.

2(2.10-t) +t= 3.70

4.20-2t+ t= 3.70 subtract 4.20 from both sides

-2t+t= 3.70-4.20 combine like terms

-t= -0.50 negative cancel out so

t = 0.50