How many ways can Patricia choose 2 pizza toppings form a menu of 9 toppings if each topping can only be chosen once?

36

Step-by-step explanation:

There are 9 different toppings

Pick the first topping

Now there are 8 toppings

Pick the second topping

9*8

72 ways to pick the toppings

But order doesn't matter

pepperoni and hamburger is the same as hamburger and pepperoni, so we divide by 2

72/2 = 36

There are 36 different ways

10 you would take 50/ .2

step-by-step explanation:

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )