Well, their speeds are (

is Jack's speed, and

is Richard's.

They, together, can paint 12 houses in 35 days. To get a single house, we only have to calculate

which is very close to 3 (a bit below)
Answer:
B
Step-by-step explanation:
Complementary angles are when two angles add up to 90 degrees.
I think construction jobs might use it
<span>2d – e = 7 </span>
<span>d + e = 5 </span>
<span>3d=12 </span>
<span>d=4 </span>
I suggest downloading the app “conects”