31-10-2019
Mathematics

contestada

Which of the following contains a variable?

A. The mass is 95 kilograms.

B. Sally ran twice as fast as Sue.

C. They drove 49 miles per hour.

D. She has 5 sisters.

Respuesta :

nguyenminhnguyet82 nguyenminhnguyet82

03-11-2019

Answer:

B

Step-by-step explanation:

We do not know how fast Sally or Sue is.

If Sally ran at a speed of x, and Sue at a speed of y, we have an equation as follows:

x = 2y

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