Answer:
8 1/4
Step-by-step explanation:
3/4= 9in
11/12= 11in
9x11=99 in
99/12=8.25
8 1/4
Answer:
Step-by-step explanation:
For the first one, in any triangle, we have the sum of two sides is greater than the third side. Hence, we have 3 inequalities: 
, which give us 
. We conclude that 
.
For the second question, we have 
, and similarly we can show that 
. Hence, 
.
The third question is not very clear.
Answer 5 is the y intercept and -2 is the slope. It is because of y=mx+b where b is the y intercept and m is the slope
The given area of the shape of 57.8·π cm², and length of the slant sides
being a factor of the radius, gives the length of the radius as <u>3.4 cm</u>.
<h3>How can the length of the radius be calculated?</h3>
Given;
Radius of the two cones are equal.
Slant height of one cone = 2 × Radius
Slant height of the other cone = 3 × Radius
Surface area of the shape = 57.8·π cm²
The curved surface area of a cone = π·r·l
Required:
The radius of the cone.
Solution;
Surface areas of the cones are therefore;
π·r × 2·r, and π·r × 3·r
The total surface area is therefore;
π·r × 2·r + π·r × 3·r = 57.8·π
5·r²·π = 57.8·π
Which gives;
r² = 57.8 ÷ 5 = 11.56
r = √(11.56) = 3.4
- The radius of the cones, r =<u> 3.4 cm</u>
Learn more about finding the surface area of 3-D shapes here:
brainly.com/question/15635229
Answer:
-30
Step-by-step explanation:
let Sarah's number be X
x-15=15x
15x*-5=105
-75x=105
-x=105-75
X=-30
I think
hope it's helpful!
