What is 2+2 in mathematics

Why do we use a coeficient to remove the propotionality

The amount of an 18% tip can be found by multiplying the bill by 0.18. Which of the following equations could be used to find the amount of a bill that has a tip of $9.72?

Jarrett's puppy weighed 3 3/4 ounce of ounces at birth. At one week old, the puppy Weighed 5 1/8 ounces. At two weeks old, the puppy weighed 6 1/2 ounces.

How do you write 156% as a fraction or mixed number in simplest form?

Tell whether the ratios are equivalent: 3 days to 4 hours and 9 days to 12 hours.

Sum of two numbers = 15. product of the numbers=36 find the numbers. what is the smaller number?

2m-13=-8m+27 What is m

An element with mass 310 grams decay by 5.7% per minute. How much of the element is remaining after 9 minutes, to the nearest 10th of a gram

Suppose 22 music learners who took the 2018 Royal Conservatory music exam are selected at random, what model would you use to find the probability that exactly 2 of the music learners will be asked to repeat the music level

Reese has 327 baseball cards. Then he lost 8 of them and gave 15 of them to his brother. Write an expression to represent the number of baseball cards he has left. Then find how many baseball cards he has left.