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=-7

step-by-step explanation:

x+3=-10

-10+3=-7

x=-7