Answer:
20n - 4
Step-by-step explanation:
the product of 20 and a number means multiplying 20 by n (the variable representing the number)
to get four less than this product, you subtract 4
A) 22:7
B) 29:22
29 - 7 = 22, so there are 22 yellow pencils.
There are 22 yellow pencils and 7 green pencils, so the ratio of yellow pencils to green pencils is 22:7.
There are 29 pencils, and 22 of them are yellow, so the ratio of all pencils to yellow pencils is 29:22.
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Work shown above! Answer is
a = 144
b = 67
