3/14
There's no way to simplify
Answer:
The numbers are -3 and 18 .
Step-by-step explanation:
Let us assume that first number be x.
Let us assume that the second number be y.
As given
A first number plus twice a second number is 12 .
Than the equation becomes
x + 2y = 12
As given
Twice the first number plus the second totals 33.
2x + y = 33
Than the two equations are
x + 2y = 12
2x + y = 33
Multiply x + 2y = 12 by 2 and subtracted from 2x + y = 33
2x - 2x + y - 4y = 33 - 24
-3y = 9
![y = \frac{-9}{3}](https://tex.z-dn.net/?f=y%20%3D%20%5Cfrac%7B-9%7D%7B3%7D)
y = - 3
Put in the equation x + 2y = 12
x + 2 ×-3 = 12
x - 6 = 12
x = 12 + 6
x = 18
Therefore the numbers are -3 and 18 .
Find the radius, then double the radius measurement to find the diameter.
STEP 1:
find the radius
A= πr^2
plug in known numbers
68= (3.14)r^2
divide both sides by 3.14
21.6560509554= r^2
take the square root of both sides
4.6536062312 cm= r
STEP 2:
diameter equals two times the radius
D= 2 * 4.6536062312
D= 9.3072124625 cm (9.3 cm rounded to nearest tenth)
ANSWER: The diameter is 9.3072124625 cm (9.3 cm rounded to the nearest tenth)
Hope this helps! :)
Answer:
the first one
Step-by-step explanation:
i did the test and got it right