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
(Unless my math is wrong) it is 390 miles
Answer:
to the first part of your question there are 100 adult at the park.
and then if the prblem stays proportional there should be 18 adults left and 54 kids in the park
Step-by-step explanation:
Answer: 272
Step-by-step explanation:
The equation is 721(0.85)^6 and uhh that’s all I know, use desmos
