haleeleslie
06.09.2020 •
Mathematics
In a jar of marbles 9 out of 15 marbles are purple. Of there are 400 marbles in the jar, how many of th are not purple?
a)6
b)9
c)160
d)1000
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Ответ:
C) 160
Step-by-step explanation:
Set up a proportion:
Cross multiply and solve for x:
15x = 3600
x = 240
This means in 400 marbles, 240 are purple.
To find how many are not purple, subtract 240 from 400:
400 - 240
= 160 marbles
So, 160 marbles are not purple
Ответ:
3-1.2=1.8
Step-by-step explanation:
12/4=3-1.2=1.8