3 years ago

The Data set shows the test scores for the mid-year exam for two different periods.

Mathematics

1 answer:

Nutka1998 [239]3 years ago

7 0

answers:

I think it is 80

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Help! I need the answer as fast as possible.

OlgaM077 [116]

I believe there are 210 blue counters in the bag im not sure but this is how i got this.

a whole will =1

1-.3=.7
there are 90 blue counters in .3 and there are 2.33333(repeat) in .7
so i multipled 2.3333(repeat) by 90. 2.3333(repeat)*90=210
-hope i got it right and that this helps-
p.s. i know it was confusing i have a very different way of thinking, lol.

8 0

3 years ago

2d=a-b/b-c - solve for a

Readme [11.4K]

$2d=\frac{a-b}{b-c}\\\\\frac{a-b}{b-c}=2d\ \ \ \ \ |multiply\ both\ sides\ by\ (b-c)\\\\a-b=2d(b-c)\ \ \ \ |add\ "b"\ to\ both\ sides\\\\\boxed{a=2bd-2cd+b}$