Answer:
1187.52
Step-by-step explanation:
2 π r h + 2 π r² = 2·π·7·20+2·π·7² ≈ 1187.52202
<h3>
Here you go i hope this will help you :) </h3>
In order to solve this problem, I would approach it in three steps:
1. First, calculate the area of the triangles drawn inside the polygon. It looks like each of the triangles has a base length of 6cm and a height of 8cm. The formula for the area of a triangle is 1/2×b×h.
Using this formula, we can calculate the area for one triangle to be:
1/2 × 6 × 8 = 24cm²
We also have a total of 8 triangles that each have the same base and height lengths, so we can find the total area that the triangles occupy by multiplying the area (24cm²) by 8.
So, the total area occupied by the triangles is:
8 × 24 = 192cm²
2. Second, we can calculate the area of the square inside the polygon. The formula for the area of a square is b*h. Our square has a base length of 12cm and a height of 12cm.
Using our formula, we can calculate the area of the square as:
12 × 12 = 144cm²
3. Our last step is to add our total areas together. This will give us the area of the whole shape.
192cm² + 144cm² = 336cm²
<em>Our final area for the polygon is 336cm².</em>
if the girls are "g" and the boys are "b"
g + b = 13
b = g + 7 <--- 7 more boys than girls
Answer:
a) 3x - 11
b) 10x + 4
Step-by-step explanation:
a) The negative sign before the (x+5) means to subtract those values. Reverse the signs. Then combine like terms:
4x –6 –x –5. 4x–x–6–5
3x –11
b) Put all the x terms together.
Put all the integers together.
Add. Adding a negative is the same as subtracting.
4x+x+5x = 10x
+6-2 = 4
Combine them:
10x + 4
Answer: $36800
Step-by-step explanation:
Principal= $23000
Rate=6%
Time= 10years
Simple interest= Principal×Rate×Time / 100
= 23000×6×10 / 100
= 1380000/100
= $13800
Amount= Principal+Interest
= 23000+13800
= $36800
