Answer:
516
Step-by-step explanation:
Step 1:
258 × 2 = 516
Answer:
516
Hope This Helps :)
Answer:
5.81%
Step-by-step explanation:
Answer:
Step-by-step explanation:
124 + 76 = 200 ☺
Answer:
80 hours
Step-by-step explanation:
let d represent doug, let l represent laura
first, set up a system of equations representing the problem:
since doug spent 10 less than twice the hours laura did, and we know that the total amount of hours they spent together is 230:
l=2d+10
d+l=230
then solve:
*first i rearranged the equations so i can solve this system of equations using elimination method*
l-2d=10
l+d=230
*subtract*
3d=240
d=80
so, doug spent 80 hours in the lab