How can a ratio's number can be changed without changing the ratio itself

One of the five cards is chosen at random. Find the probability of choosing a card with a number that is a six. Write answer as a simplified fraction number, No decimals or percents:

How can I equivalent 16-4x^2

There were 100 question on the unit test Alondra answer 97 of the questions correctly what decimal represent the fraction of question Alondra answer correctly

If 7 units equals to 98 liters, how many liters will 15 units have?

Janet has 17 quarters and $13 in bills. How much total money does she have?

What is 36/2 plus 12/8?

On the last history quiz, Kanesha answered 0.75 of the 20 questions correctly. How many questions did Kanesha answer correctly?

When one New Zealand dollar, NZ$0.77, was worth US$0.77, how much was US$1.00 worth in New Zealand dollars?

Select the letter of the correct answer. Suppose a bucket contains 1,898 sunflower seeds. If this bucket contains 26 times more seeds than another bucket, how many sunflower seeds are in the other bucket?

He radius r of a circle is increasing at a rate of 6 centimeters per minute. find the rate of change of the area when r = 35 centimeters. cm2/min