What is 227.9 million km written in scientific notation

What is 128 hundredths written as a decimal?

How do you solve 27=22-2 (3-1w)

A rectangle-shaped lot is 26.7 m long and 10 m wide. if fencing comes in 30 m rolls, how many rolls must be bought to fence the lot?

What is the slope of a horizontal line? A Vertical line? Explain your reasoning

When paper burns in a fire, what is one reactant?

Y = 3x + 1 Y = x + 5 Solving systems of equations

What is the best way to convert metric units (I'm really bad at this ...)

4x^2 + 3 (3 - 3x^2)

In a boat race, Maggi and Jagriti start off together. Maggi rowed the boat at 4 km/h and Jagriti rowed at a speed of 6 km/h. By how many kilometres was Maggi lagging behind Jagriti after 2 hours.

Stephanie is registering her son for swim lessons. There is a one-time $45 registration fee plus a $20 fee per lesson. Stephanie paid a total of $225. For how many lessons did Stephanie register?