Question

4. Dariella walks at / and then runs ( + ) at /. The average speed of this journey is / find X

Answer 1

ANSWER:

5x + 10y = 35 (distance) --> x + 2y = 7

t = d/r = 35/7 = 5 hours

x + y = 5

x + 2y = 7

---------------- Subtract

-y = -2

y = 2

x = 3

STEP - BY - STEP

let the digits these

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