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Mathematics

Grade-8

Easy

Question

The cost of pizza is $8, the cost of 2 burgers is $7. The costliest among the following is

4 pizzas
8 Burgers
7 Burgers
2 Pizzas and 3 burgers

hint Hint:

In order to find the correct answer, you need to first solve the equations.

The correct answer is: 4 pizzas

$C o s t space o f space p i z z a space equals space x space equals space $ 8 C o s t space o f space 2 space b u r g e r s space equals space $ 7 T h e r e f o r e comma space cos t space o f space 1 space b u r g e r space equals space y space equals space $ open parentheses 7 over 2 close parentheses T o space d e t e r m i n e space t h e space cos t l i e s t space a m o n g space t h e space f o l l o w i n g space o p t i o n s comma space w e space n e e d space t o space s o l v e space t h e m. A right square bracket space 4 space p i z z a s equals space 4 x equals space 4 open parentheses 8 close parentheses equals space $ 32 B right square bracket space 8 space b u r g e r s equals space 8 y equals space 8 open parentheses 7 over 2 close parentheses equals space $ 28 C right square bracket space 7 space b u r g e r s equals space 7 y equals space 7 open parentheses 7 over 2 close parentheses equals space $ 24.5 D right square bracket space 2 space p i z z a s space a n d space 3 space b u r g e r s equals space 2 x space plus space 3 y equals space 2 open parentheses 8 close parentheses space plus space 3 open parentheses 7 over 2 close parentheses equals space 16 space plus space open parentheses 21 over 2 close parentheses equals space open parentheses fraction numerator 32 space plus space 21 over denominator 2 end fraction close parentheses equals space open parentheses 53 over 2 close parentheses equals space $ 26.5 T h e r e f o r e comma space O p t i o n space A space i. e. space t h e space cos t space o f space 4 space p i z z a s space i s space t h e space cos t l i e s t space a m o n g space t h e space f o l l o w i n g.$

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