The negative in front of the parenthesis is canceling out the negative inside of the parenthesis since they are both negatives. Now, you just have to multiply both fractions and find the product.
5×20%=100% so 1360mg is 80% of the daily requirement. The total requirement is 1360/0.8=13600/8=1700 mg.
Rate of change means derivative or slope. So you’d go down 3 and right one. I have no clue what you want me to do with y = x
Wouldn’t y =x be a straight line from the origin with a slope of 1?
a/b=5/4
a=5k
b=4k
b/c=7/3
b=7x
c=3x
b=4k
b=7x
4k=7x =>
k=7y
x=4y
a/b/c=
=5*7*y/4*7*y/3*4*y=
=35y/28y/12y=
=35/28/12y=
=5/4/12y=
=1,25/12y=
=0.1041666666666667/ y
there may be a mistake in my answer
