madison11robert madison11robert

23-02-2018
Mathematics

contestada

4.2(3.9r – 5.9s) + 7.9s – 9.53r

A.
16.88r + 6.85s
B.
10.82r + 31.15s
C.
10.82r – 31.15s
D.
6.85r – 16.88s

Respuesta :

sqdancefan sqdancefan

25-07-2019

Answer:

D. 6.85r – 16.88s

Step-by-step explanation:

Use the distributive property to eliminate parentheses, then collect terms.

4.2(3.9r -5.9s) +7.9s -9.53r

= 16.38r -24.78s +7.9s -9.53r

= (16.38 -9.53)r +(-24.78 +7.9)s

= 6.85r -16.88s

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