Answer:
<h2>A = 177 cm²</h2>
Step-by-step explanation:
A diameter is two times longer than a radius. Therefore, if the diameter
d = 15cm, then the radius r = (15cm) : 2 = 7.5cm.
The formula of an area of a circle:

Substitute:


Then

Answer:
3x+7=22
Step-by-step explanation:
three times a number is

so the sum of 3x and 7 is 22

you can leave it here

if you need the value of x
then

Answer:
-2z-2
Step-by-step explanation:
5z-8-4z-3z+6
5z-4z-3z-8+6
-2z-2
Answer:
105
Step-by-step explanation:
By solving for the other triangles, we know that the angles of a triangle add up to be 180 degrees. The angle for the triangle on the left is 25 and for the triangle on the right is 50. So we have the measurements, 25, 50 and x for our middle triangle from which we can see x=105
2(5.9) is 11.8
Hopefully i is right I did this in my head.