Elias and niko are polishing the silver at the heritage museum. elias could polish all the silver himself in 40 minutes. that task would take niko 50 minutes to complete alone. which table is filled in correctly and could be used to determine how long it would take if elias and niko polished the silver together?

The first table will determine how long it takes for Elias and Niko to polish the silver.

The rate is the unit rate. Since Elias cleans all of it in 40 minutes, his rate is 1/40. Similarly, Niko’s rate would be 1/50. Their time is the same because they are working at the same time, so we can write that as t. Then, the part of the silver polished would be the rate * time, or:

Elias: 1/40 * t

Niko: 1/50 * t

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

the answer would be 150 books

step-by-step explanation:

if you divide 300 by 2 you will get 150