The area of a circle is A=πr².
Since π is about 3.14 we can substitute that into the equation.
So A=3.14×r²
We can substitute the given radius for r.
A= 3.14 × 5²
When a number is squared, or has the two over it, we multiply it by itself.
5 × 5= 25
A= 3.14 × 25
Simplify this and the area of the circle is about 78.5
A≈78.5
The park is 2.25 km away, and Dave can travel .15 km per minute. Divide 2.25 by .15 to get how many minutes it will take him to get to the park. 2.25/.15 = 15. It will take Dave 15 minutes to get to the park.
Answer:
Hello,
Step-by-step explanation:
Answer:
Look below. The answers are bolded!
Step-by-step explanation:
1. <em>10x + 23</em>
5+6(2x+3)-2x
Distribute first!
5 + 12x + 18 -2x.
Now you can combine like terms.
23 + 10x
2. <em>18x + 6</em>
3(4x+8) + 3(2x-6)
Distribute first!
12x + 24 + 6x - 18
Now you can combine like terms.
18x + 6
3. <em>-2x + 8</em>
(32-8x)
____
___
4
Divide 32 and -8x by 4.
32/4 = 8
-8x/4 = -2x
-2x + 8
4. <em>4x + 3</em>
24x+18
______
6
Divide 24x and 18 by 6
24x/6 = 4x
18/6 = 3
4x + 3
Answer:
Evaluate each expression below for the given value. That is, find the value of the expression when the variable is equal to the value given.
Giving 20 points.
a. 2a - 7 when a = 3
b. 10 + 4m when m = -2
c. 9 + (-2n) when n = 4
d. x/2 + 5 when x = 6
