Communicate mathematical ideas when adding two numbers with the same sign, what sign do you use fir the sum?

The plus sign + that’s the sign

Yeah the plus sign should be the answer.

y=−9/2x+10

step-by-step explanation:

let's solve for y.

0−9x−2y=−20

step 1: add 9x to both sides.

−9x−2y+9x=−20+9x

−2y=9x−20

step 2: divide both sides by -2.

−2y

−2

=

9x−20

−2

y=

−9

2

x+10

in simplified version   it would be x ≤-4

step-by-step explanation:

multiply each term in x ≤-4 by -1