WILL GIVE BRAINLIEST EVALUATE THIS EXPRESSION

-b+3vy-xb+4

if b=-2
y=-1
v=3
x=1

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

Multiplying an even number of negative numbers gives an answer that is choose from:

What is the value of r of the geometric series?