**Answer:**he usual assumption is that there is a 50% chance of heads on each toss of each coin. So, the chances of getting at least two heads when tossing three coins at the same time is 4/8 (Because all the 8 possibilities are equally likely) 50 percent.

**Step-by-step explanation:**

**Answer:**

The value of x = 4 when the value of y = 12

**Step-by-step explanation:**

∵ y α x ⇒ it is direct variation

- It means y increase when x increase

∴ y = kx ⇒ where k is a constant

- To find the value of k we will substitute the values of x

and y in the equation above

- If y = 6 when x = 2

∴ 6 = k(2) ⇒ divide two sides by 2

∴ k = 3

∴ y = 3x ⇒ equation of variation

- To find the value of x when y = 12

- Substitute the value of y in the equation of variation

∴ 12 = 3x ⇒ divide both sides by 3

∴ x = 4

* The value of x = 4 when the value of y = 12

**Answer:**

**Step-by-step explanation:**

So we have

First what we must do is do the rule of out exponent by in exponent. A.K.A in parenthesis and out parenthesis.

So

3 * 4 = 12

Now do the additive property :

12 + 6 = 18

**Step-by-step explanation:**

D=9

A=pie*radius^2

=3.14*9/2*9/2

=63.58

=64