Answer:
x^2+x-20
Step-by-step explanation:
x = 4
x - 4 = 0
x = -5
x + 5 = -5
(x + 5)(x - 4)
x^2+x-20
I think that the third side would be 13 inches. My reasons are :
1) An isosceles triangle's two sides that point upward are usually longer than the last side on the bottom.
2) Unless it is a scalene triangle, either two sides or all sides are equal.
The big keyword here is the word RATIO. Ratio of what? The ratio of girls to boys in the entire grade. A ratio is just the two amounts divided by each other (you can also call it the slope, but ignore that if that makes it more confusing).
(81 girls)/(72 boys)
Simplify it by breaking it up a bit.
81 = 9 * 9
72 = 9 * 8

Cross out similar terms to gain the result of:

What they want from us is the ratio of girls if a group has 16 boys. So set it up like this:

Just by looking at this you may be able to solve for "x" if you have a good understanding of fractions, but instead let's do the long way.
First off is to get "x" alone by multiplying 16 boys on both sides.
x =

Remember that:
16 = 8*2
x =

Cancel out the like terms (8) to give you:
x = 18 girls
Answer:



Step-by-step explanation:
a = 
b = 
c = 
<u><em>Finding a*b:</em></u>
a*b =(
)*(
)
= (3.47*4.61) * (
)
When bases are same, powers are to be added
= 15.997 * 
= 15.997 * 
= 159.97
Rounding it off
=> 1.60 * 10²
<u><em>Finding a/b:</em></u>
=> 
Using rule of exponents 
=> 0.753 * 
=> 
=> 
=> 7.53 * 10⁻¹⁴
<u><em>Finding c/a:</em></u>
=> 
=> 1.59 * 
=> 1.59 * 10¹³
Answer:
1
Step-by-step explanation:
to divide a fraction you need to repeat the first fraction and multiply it by the second fraction but upside down (so instead of 3/4 you would multiply it by 4/3)
it would be 3/4 x 4/3 = 12/12 which if you reduce the result = 1