There are 12 cards with the letters a or b on them. there are twice as many A's as there are B's . what is the ratio A's to total the number of cards.
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The ratio of A's to total number of card is 2 to 3.

The right answer is Option b.

Step-by-step explanation:

Given,

Total number of cards = 12

Let,

Number of cards written A on them = a

Number of cards written B on them = b

According to given statement;

a + b = 12      Eqn 1

a = 2b    Eqn 2

Putting value of a from Eqn 2 in Eqn 1

Dividing both sides by  3

Putting b=4 in Eqn 2

a = 2(4) = 8

Ratio of A's cards to total number of cards = 8 : 12

Simplifying

Ratio of A's to total number of cards = 2 : 3

The ratio of A's to total number of card is 2 to 3.

The right answer is Option b.

answer: 80,000

step-by-step explanation:

the population doubles every day.

10,000*2=20,000 day 4

20,000*2=40,000 day 5

40,000*2=80,000 day 6

-12 > a

step-by-step explanation:

-11 > 1 + a

subtract 1 from each side

-11 -1> 1 -1+ a

-12 > a