Are rational numbers closed under addition, subtraction, multiplication, and division?

What is y=4x-5 substituted?

Sheila and her study partner flipped a coin 120 times. They flipped 70 heads and 50 tails. What is the experimental probability that the next flip will be heads up?

Work out the value of 2b 6 when b=9

Calculate the mean 4,6,6,7,2

How do I complete each pattern, Example 1 block, 3 blocks, 6 blocks

A day care worker found 28 children absent one day during an epidemic of chicken pox. If this was 35% of the total number of children attending the day care center, how many children attend this day care center?

Jessica is baking a cake the recipe says that she has to mix 96 grams Jessica knows that 1 cup of this particular sugar has a mass of 128 grams she added 1/2 of a cup of sugar to the flour.

A square's side is increased by yards, which corresponds to an increase in the area by square yards. how many yards is the side of the initial square? the side is 5.92 yards.

If f (x) = 5x + 4, what is the inverse of f (x)

Marcie bought a jacket using the British currency pounds the jacket costs 45 pounds if 1.00$ = 1.64 pounds what was the cost in dollars