A teacher has 21 red pens. If the ratio of red pens to blue pens she owned was 3:1 , how many pens did she have total?
1 answer:
21/3 is 7 so there are 7 pens for every 1 ratio
7 x 1 = 7
21+7 = 28
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Answer:
n=6
Step-by-step explanation:
(n-18)/3 = -4
multiply by 3
n-18 = -12
add 18
n = 6
Answer:
1/84
Step-by-step explanation:
