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.
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Khánh Gia 4 weeks 2021-08-19T13:34:35+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-08-19T13:35:46+00:00

    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!

    0
    2021-08-19T13:35:49+00:00

    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

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