Answer:
A
Step-by-step explanation:
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
Answer:
Step-by-step explanation:
Just because before y there is negative "-" thus youve got to put it before 18. Eventually the answer is -18,not 22
Answer: 1/4 chance of picking a diamond
Step-by-step explanation:
13 spades + 13 hearts + 13 diamonds + 13 clubs = 52 total
so 13/52 or 1/4
The answer is : 24
You must do 3 x 8 to get your answer