It depends on how big the fish tank is. I need the image
8n+3+9n+7=180
17n+10=180
17n=170
Answer
N=10
Answer:
take 42 degree as reference angle
using sine rule
sin 42=opposite/hypotenuse
0.66=x/23
23*0.66=x
15.18=x
15.2=x
take x degree as reference angle
using cos rule
cosx=adjacent/hypotenuse
cosx=29/42
cosx=0.69
cos 46 =0.69
therefore x=46 degree
Step-by-step explanation:
499-162=287
287 rounded to the nearest hundred is 300
the answer is 300
Answer:
Go through the explanation you should be able to solve them
Step-by-step explanation:
How do you know a difference of two square;
Let's consider the example below;
x^2 - 9 = ( x+ 3)( x-3); this is a difference of two square because 9 is a perfect square.
Let's consider another example,
2x^2 - 18
If we divide through by 2 we have:
2x^2/2 -18 /2 = x^2 - 9 ; which is a perfect square as shown above
Let's take another example;
x^6 - 64
The above expression is the same as;
(x^3)^2 -( 8)^2= (x^3 + 8) (x^3 -8); this is a difference of 2 square.
Let's take another example
a^5 - y^6 ; a^5 - (y ^3)^2
We cannot simplify a^5 as we did for y^6; hence the expression is not a perfect square
Lastly let's consider
a^4 - b^4 we can simplify it as (a^2)^2 - (b^2)^2 ; which is a perfect square because it evaluates to
(a^2 + b^2) ( a^2 - b^2)
