Which correctly gives the expression using addition?

14.3 – (–21.2)

a.
14.3 + (–21.2)

b.
14.3 + 21.2

c.
–14.3 + (–21.2)

d.
–14.3 + 21.2

What expression is equivalent to (84+16)

One file clerk can file 10 folders per minute. a second file clerk can file 11 folders per minute. how many minutes would the two clerks together take to file 672 folders?

Simplify the algebraic expression 8y-2(y+4)