Anonymous4338

Maryanne planted 4 rows with 10 plants each, so we must multiply 4 rows by 10 plants.

4*10=40

Maryanne planted 40 plants.

Gary planted 5 rows with 4 plants each, so we do the same thing.

5*4=20

Gary planted 20 plants.

Maryanne planted more corn than Gary.

(You can also tell in this specific case that Maryanne planted more because she has higher numbers. Note that this isn't a practical way to do it, though.)

because

Let's follow PEMDAS (Parenthases, Exponents, Multipication/Division, Addition/Subtraction).

-3.1/1.2(5.3)

We're reading this left to right, so we start by doing -3.1/1.2, which is approximately -2.583

-2.583(5.3)

Then, we multiply.

-2.583*5.3=-13.689

-3.1/1.2(5.3)= approximately -13.69

375*472,000,000,000=177,000,000,000,000

If you need to figure out these types of equations, just use the site's calculator by clicking the Home tab at the top of the page.

Let's go step by step.

3y=2y+1/8

First, subtract 2 y from each side of the equals sign.

3y-2y=1y, so th left side would become y, and 2y-2y=0, so the right side becomes 1/8. Putting it together gets us a new equation of...

y=1/8

4-7=-3

You can use the site's Calculator by clicking the Home tab on the top of the page.

Let me explain further.

Commas are often used just to seperate the different place values.

Ex.

10000000000000000

Tnis number is hard to read, right? It's difficult to tell what number it is.

However...

10,000,000,000,000,000

The commas divide up the zeros so you can count ones, thousands, millions, billions, trillions, and so on.

It's much easier to see what number it is since many numbers compose it.

Commas do not change the value, they are just there to help you read the number.

Actually, Guest, it depends on what you are finding percentage from!

If you want to change a fraction to a percentage, just solve it (by dividing the numerator by the denominator), move the decimal point 2 spots to the right, and add a percentage symbol.

Ex.

3/5=0.8=80%

For decimals, do the last two steps you did with fractions by moving the decimal point two spots to the right and adding a percentage symbol.

Ex.

0.638=63.8%

Just a tip, remember that percentages can be over 100%!

The pages are page 17 and 18.

17*18=306

For this, we must solve...

125/100=25/x

Cross multiply by multiplying each numerator by the other fraction's denominator and you get...

125x=2500

Sivide by 125 on each side...

x=20

I think you can use the work I've shown you here to figure out the other problems you have.