How do you figure out circumference?

2 answers:

4 0

If you know the diameter of the circle, multiply the diameter by PI

if you know the radius of the circle multiply the radius by 2 then multiply by PI

Amanda [17]3 years ago

3 0

The circumference of a circle is as follows

given the Diameter: $C= \pi *d$
given the radius: $C=2* \pi *r$

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Sarah the yearbook editor and Mrs Moore the yearbook sponser are reviewing costs to produce the yearbook. New yearbook design so

mario62 [17]

Answer:

I think the answer would be best supported with an equation. Then everything will fall into place

Step-by-step explanation:

We have a pre-set amount of $800. That will not change.

The key word here is each. It costs $15 to print <em>each</em> yearbook. Each depends on how many yearbooks are bought.

We will use y to represent the amount of yearbooks bought, and t to represent the total cost.

Equation:

800 + 15y = t

<u>Let's try an example:</u>

<em>The yearbook club finds that 50 people have decidedly bought yearbooks! They are so excited! But they have a problem. They don't know how much the whole thing is going to cost: the yearbook software cost AND the amount they must spend on printing each yearbook. What is the total cost?</em>

So we have an equation: 800 + 15y = t. Now we just substitute in the numbers and voila! We get our answer. Let's solve!

800 + 15y = t

800 + 15(50) = t (y is the amount of yearbooks bought. 50 people

800 + 750 = t bought yearbooks).

1150 = t (t is the total cost of everything).

Our total cost is $1150! That is how much it'll cost to make all the yearbooks, including the yearbook software.

I hope this helps!

<h2><u>PLEASE MARK BRAINLIEST!</u></h2>

5 0

3 years ago

If x - 4 , x + 2 and 3x + 6 form a geometric sequence, find x.

Alex17521 [72]

Answer:

x =7

Step-by-step explanation:

Remark

A geometric sequence always has terms that are separated by a common ratio. For example 3 9 27 81 243 ....
Each term is multiplied by a common number and the term before it. In this case the common term is 3.
To get the next term after 9, you multiply 9 by 3.
To get the common ratio divide the second term by the first and then the third term by the second

Equation

(x + 2)/(x - 4) = (3x + 6)/ (x + 2)

Solution

I would begin this problem by taking out the common factor on the top right term. You'll see why in a second.

(x + 2)/(x - 4) = 3(x + 2)/ (x + 2) Notice the two binomials on the right cancel.