The radius is always half the diameter. So, your answer is A.
Answer:
Squares:
1 is 12.4in
6.2 x 6.2 = 12.4
2 is 21 in
5 1/2 x 4 = 21
Triangles:
1 is 48 in
16+16+16=48
2 is 21 in

hoped that helped:P
Step-by-step explanation:
Answer: y= -17
Step-by-step explanation:
y= 1 - 2x
so when x=9,
y= 1 - 2(9)=1 - 18= -17
Answer:

Step-by-step explanation:
The diagonals of a parallelogram bisect each other.
This means that:

Add x to both sides:


Divide both be sides by 3

Therefore the value of x is

<h2>
Answer:</h2>
<u>The frequency is</u><u> 2Hz</u>
<h2>
Step-by-step explanation:</h2>
Using the formula
<h3>Wavelength = speed / Frequency</h3>
Arranging the equation
Frequency = Speed / Wavelength
Frequency = 200 / 100
Frequency = 2 Hz