So if you solve for n
4n^2+3=7n
make into trinomial
subtract 7n from both sides
4n^2-7n+3=0
if we can factor this, then we can asume that the factors are equal to zero becase if
xy=0 then assume x and/or y=0 so
to factor an equation in ax^2+bx+c where a is greater than 1 then
b=t+z
a times c=t times z
to factor 4n^2-7n+3 you do
4 times 3=12
what 2 numbers multiply to get 12 and add to get -7
the numbers are -3 and -4 so
split up the -7
4n^2-4n-3n+3
group
(4n^2-4n)+(-3n+3)
undistribute
(4n)(n-1)+(-3)(n-1)
reverse distributive property
ab+ac=a(b+c)
(4n-3)(n-1)=0
set each to zero
4n-3=0
add 3 to both sides
4n=3
divide both sides by 4
n=3/4
n-1=0
add 1 to both sides
n=1
n=3/4 or 1
The answer is David, because $20 is the biggest
Answer:
105
Step-by-step explanation:
180 - 75 = 105
You Must First Change 8% To A Decimal Or Fraction. So, Move The Decimal Point In 8.0% Over Two Places. This gives You 0.08. Now, Convert to a fraction. This Becomes:
8
-----
100
Now, divide. Dividing is the same as multiplying by the reciprocal.
So, This Gives You:
8 1
----- • -----
100 100
So, This Gives You:
8/10,000
